. Osanloo, M. (1999). Coal Engineering. Naghoos Publishers. pp. 261-270.
. Chikkatur, A.P., Sagar, A.D. and Sankar, T.L. (2009). Sustainable development of the Indian coal sector. Energy, 34, 942-953.
. Soderberg, A, Rausch, D.O. Surface Mining (Section 4.1). Pfleider, E.P., American Institute of Mining, Metallurgical, and Petroleum Engineers (AIMM), New York: 1968, pp. 142–143.
. Popover, G. (1971). The working of mineral deposits (Translated from the Russian by Shiffer, V.). Moscow: Mir publishers.
. Nilsson, D.S. (1992). Surface vs. Underground Methods. SME Mining Engineering Handbook (Section 23.2), edited by Hartman, H.L. pp. 2058−2068.
. Chen. J., Li. J., Luo., Z. and Guo, D. (2001). Development and Application of Optimum Open-Pit Limits Software for the Combined Mining of Surface and Underground. Proceedings of CAMI Symposium 2001: 303−306.
. Chen, J., Guo, D. and Li, J. (2003). Optimization Principle of Combined Surface and Underground Mining and Its Applications. Journal of Central South University of Technology 2003 (10): 222−225.
. Visser, W.F. and Ding, B. (2007). Optimization of the Transition from Open-Pit to Underground Mining. Proc. 4th AACHEN Int. Mining Symp. High Performance Mine Production. Germany. 131–148.
. Bakhtavar, K., Shahriar, K. and Mirhassani, A. (2012). Optimization of the Transition from Open-Pit to Underground Operation in Combined Mining Using (0-1) Integer Programming. Journal of the Southern African Institute of Mining and Metallurgy 2012 (112): 1059-1064.
. Newman A, Yano C, Rubio E. “Mining above and below ground: timing the transition”. IEE Transactions 2013 (45): 865-882.
. Dagdelen, K. and Traore, I. (2014). Open-pit transition depth determination through global analysis of open pit and underground mine production scheduling. In Proceedings Orebody Modelling and Strategic Mine Planning Conference. The Australasian Institute of Mining and Metallurgy 2014: 195-199.
. Lerchs, H. and Grossman, I.F. (1965). Optimum Design of Open-Pit Mines, Joint CORS and ORSA Conference, Montreal: Canadian Institute of Mining and Metallurgy.
. Ordin A.A and Vasil’ev, I.V (2015). Optimized Depth of Transition from Open-Pit to Underground Coal Mining. Journal of Mining Science, 2014, Vol. 50 (4): 696–706.
. King, B, Goycoolea, M. and Newman, A. (2017). Optimizing the open-pit to underground mining transition”, European Journal of Operational Research 2017 (257): 297-309.
. MacNeil, J. and Dimitrakopoulos, R. (2017). A stochastic optimization formulation for the transition from open pit to underground mining. Optimization and Engineering 2017 (18): 793–813.
. Soltani, Khaboushan. and A., Osanloo, M. (2019). An Uncertainty-based Transition from Open Pit to Underground Mining. IJE TRANSACTIONS B: Applications Vol. 32 (8), pp 1218-1224.
. Afuma, B., O., Ben-Awuah, E. and Askari-Nasab, H. (2019). A mixed integer linear programming framework for optimizing the extraction strategy of open pit – underground mining options and transitions. International Journal of Mining, Reclamation and Environment. https://doi.org/10.1080/17480930.2019.1701968.
. Soltani Khaboushan, A. and Osanloo, M. (2020). Semi-symmetrical production scheduling of an orebody for optimizing the depth of transitioning from open-pit to block caving. Resources Policy (68). https://doi.org/10.1016/j.resourpol.2020.101700.
. Soltani Khaboushan, A. and Osanloo, M. (2019). A Set of Classified Integer Programming (IP) Models for Optimum Transition from Open-Pit to Underground Mining Methods. Natural Resources Research. 2020 (29): 1543-1559.