[1] Hartmann, S., & Briskorn, D., (2010). A survey of variants and extensions of the resource-constrained project scheduling problem, European Journal of Operational Research, 207(1), 1-14.
[2] Blazewicz, J., Lenstra, J.K. & Kan, A., (1983). Scheduling subject to resource constraints: Classification and complexity, Discrete Applied Mathematics, 5(1), 11-24.
[3] Shahbazi, S., Sajjadi, S.M., & Jolai, F., (2018). A Simulation-Based Optimization Model for Determining the Sequence of Implementing Projects Related To New Product Development, Modern Researches in Decision Making, 2(4), 129-152.
[4] Chen, J., Fowler, J., Kempf, K., & Mason, S., (2015). Multi-mode resource-constrained project scheduling Problems with non-preemptive activity splitting, Computers & Operations Research, 53(2), 275-287.
[5] Hartmann, S., (2013). Project scheduling with resource capacities and requests varying with time: a case study, Flexible Services and Manufacturing Journal, 25(1), 74-93.
[6] Néron, E., & Baptista, D., (2002). Heuristics for multi-skill project scheduling problem, International Symposium on combinatorial optimization (CO’2002), Paris, France.
[7] Ghafoori, S., & Taghizadeh Yazdi, M.R., (2017). Proposing a Multi-Objective Mathematical Model for RCPSP and Solving It with Firefly and Simulated Annealing algorithms, Modern Researches in Decision Making, 1(4), 117-142.
[8] Maghsoudlou, H.M., Nadjafi, B., & Niaki, S.T.A., (2017). Multi-skilled project scheduling with level-dependent rework risk; three multi-objective mechanisms based on cuckoo search, Applied Soft Computing, 54, 46-61.
[9] Lee, K. S. & Geem, Z. W., (2005). A New Meta-Heuristic Algorithm for Continuous Engineering Optimization: Harmony Search Theory and Practice, Computer Methods in Applied Mechanics and Engineering, 194, 3902-3933.
[10] Rastgar, I., & Sahraeian, R., (2013). Developing harmony search algorithm for solving optimization problems: a case study in parallel machine production scheduling problem, Journal of Industrial Engineering Research in Production Systems, 1(1), 57-71.
[11] Bartusch, M., Mohring, R.H., & Radermacher, F.J., (1988). Scheduling project networks with resource constraints and time windows, Annals of Operations Research, 16(1), 201–240.
[12] Sprecher, A., (1994). Resource-constrained project scheduling: exact methods for the multi-mode case, Number 409 in lecture notes in economics and mathematical systems. Springer, Berlin, DOI: 10.1007/978-3-642-48397-4.
[13] Buddhakulsomsiri, J., & Kim, D.S., (2006). Properties of multi-mode resource-constrained project scheduling problems with resource vacations and activity splitting, European Journal of Operational Research, 175(1), 279-295.
[14] Ho, S., & Leung, J., (2010). Solving a manpower scheduling problem for airline catering using metaheuristics, European Journal of Operational Research, 202(3), 903-921.
[15] Cordeau, J., Laporte, G., Pasin, F., & Ropke, S., (2010). Scheduling Technicians and Tasks in a Telecommunications Company, Journal of Scheduling, 13(4), 393-409.
[16] Liu, S., & Wang, C., (2012). Optimizing linear project scheduling with multi-skilled crews, Automation in Construction, 24, 16-23.
[17] Kazemipoor, H., Tavakkoli-Moghaddam, R., Shahnazari-Shahrezaei, P., & Azaron, A., (2013). A differential evolution algorithm to solve multi-skilled project portfolio scheduling problems, The International Journal of Advanced Manufacturing Technology, 64(5-8), 1099-1111.
[18] Myszkowski, P.B, & Skowronski, M., (2013). Specialized genetic operators for multi skill resource-constrained project scheduling problem, 19th International Conference on Soft Computing MENDEL, 57-62.
[19] Mehmanchi, E., & Shadrokh, S., (2013). Solving a New Mixed Integer Non-Linear Programming Model of the Multi-Skilled Project Scheduling Problem Considering Learning and Forgetting Effect, Proceedings of the 2013 IEEE IEEM, Bangkok, Thailand.
[20] Kazemipoor, H., Tavvakoli-Moghaddam, E., & Sharezaei, P., (2013). Solving a novel multi-skilled project scheduling model by scatter search, South African Journal of Industrial Engineering, 24(1), 121-135.
[21] Tabrizi, B.H., Tavvakoli-Moghaddam, R., & Ghaderi, S.F., (2014). A two-phase method for a multi-skilled project scheduling problem with discounted cash flows, Scientia Iranica, 21(3), 1083-1095.
[22] Zheng, H., Wang, L., & Zheng, X., (2015). Teaching–learning-based optimization algorithm for multiskill resource constrained project scheduling problem, Soft Computing, 21(6), 1537-1548.
[23] Javanmard, S., Nadjafi, B., & Niaki, S.T.A., (2016). Preemptive multi-skilled resource investment project scheduling problem; mathematical modelling and solution approaches, Computers and Chemical Engineering, 96(1), 55-68.
[24] Maghsoudlou, H.M., Nadjafi, B., & Niaki, S.T.A., (2016). A multi-objective invasive weeds optimization algorithm for solving multi-skill multi-mode resource constrained project scheduling problem, Computers and Chemical Engineering, 8(1), 157-169.
[25] Chen, R., Liang, C., Gu, D., and Leung, J., (2017). A multi-objective model for multi-project scheduling and multi-skilled staff assignment for IT product development considering competency evolution, International Journal of Production Research, 55(21), 1-29.
[26] Geem, Z.W., Kim J.H. & Loganathan G.V. (2001). A new heuristic optimization algorithm: harmony search. Simulations, 76, 60–68.
[27] Kalivarapu, J., Jain, S., & Bag, S., (2015). An improved harmony search algorithm with dynamically varying bandwidth, Engineering Optimization, 48(7), 1091-1108.
[28] Wang, L., Pan, Q.K., & Tasgetiren, M.F., (2011). A hybrid harmony search algorithm for the blocking permutation flow shop scheduling problem, Computers & Industrial Engineering, 61(1), 76–83.
[29] Bagher, M., Kassaee, M., Allam Tabriz, A., & Zandieh, M., (2018). Truck Scheduling in Distribution Systems with Multiple Cross Docks and No Intermediate Storage, Modern Researches in Decision Making, 2(4), 1-27.
[31] Asadi, R., Kazemzadeh, R., Nakhaei Kamal Abadi, I., & Bagherinejad, Z., (2013). A Joint Ordering Model for Automotive parts in Two-level Supply Chain, Management Research in Iran, 17(2), 1-18.