73. Salameh, B.H., Qawasmeh, R., and Al-Ajlouni, A.F. : Routing With Intelligent Spectrum Assignment in Full-Duplex Cognitive Networks Under Varying Channel Conditions. In: Journal of IEEE Communications Letters 2020, pp. 872-876.

74. Salani, M., and Rottondi, C., and Tornatore, M. : Routing and Spectrum Assignment Integrating Machine-Learning-Based QoT Estimation in Elastic Optical Networks. In: IEEE INFOCOM - IEEE Conference on Computer Communications 2019, pp. 173846.

75. Santos, A.F.D, and Assis, K., and Guimarães, M.A., and Hebraico, R.: Heuristics for Routing and Spectrum Allocation in Elastic Optical Path Networks. In: 2015, Journal Of Modern Engineering Research (IJMER), pp. 1-13.

76. Gamrath, G., Anderson, D., Bestuzheva, K., Chen, W.K., Eifler, L., Gasse, M., Gemander, P., Gleixner, A., Gottwald, L., Halbig, K., and Hendel, G., and Hojny, C., Koch, T., Bodic, L., Maher, P. J., Matter, F., Miltenberger, M., Mühmer, E., Müller, B., Pfetsch, M.E., Schlösser, F., Serrano, F., Shinano, Y., Tawfik, C., Vigerske, S., Wegscheider, F., Weninger, D., and Witzig, J.: The SCIP Optimization Suite 7.0. In: http://www.optimization-online.org/DB_HTML/2020/03/7705.html, March 2020.

77. Selvakumar, S., and Manivannan, S.S. : The Recent Contributions of Routing and Spectrum Assignment Algorithms in Elastic Optical Network (EON). In: International Journal of Innovative Technology and Exploring Engineering (IJITEE) 2020, pp. 1-11.

78. Shirazipourazad, S., Zhou, C., Derakhshandeh, Z., and Sen, A. : On routing and spectrum allocation in spectrum-sliced optical networks. In: Proceedings IEEE INFOCOM 2013, pp. 385-389.

79. Schrijver, A. : Combinatorial Optimization - Polyhedra and Efficiency. In: Springer-Verlag 2003.

80. Schrijver, A. : Theory of Linear and Integer Programming. In: John Wiley & Sons, Chichester 1986.

81. Talebi, S., Alam, F., Katib, I., Khamis, M., Salama, R., and Rouskas, G. N. : Spectrum management techniques for elastic optical networks: A survey. In: Optical Switching and Networking 2014.

82. The Network Cisco's Technology News Site: Cisco Predicts More IP Traffic in the Next Five Years Than in the History of the Internet. In: https://newsroom.cisco.com.

83. Trotter, L.E. : A class of facet producing graphs for vertex packing polyhedra. In: Journal of Discrete Mathematics 1975. pp. 373-388.

84. Velasco, L., Klinkowski, M., Ruiz, M., and Comellas, J. : Modeling the routing and spectrum allocation problem for flexgrid optical networks. In: Photonic Network Communications 2012, pp. 177-186.

85. Walkowiak, K., and Aibin, M. : Elastic optical networks - a new approach for effective provisioning of cloud computing and content-oriented services. In: Przeglad Telekomunikacyjny + Wiadomosci Telekomunikacyjne 2015.

86. Wan, X., and Hua, N., and Zheng, X.: Dynamic Routing and Spectrum Assignment in Spectrum-Flexible Transparent Optical Networks. In: Journal of Optical Communications and Networking 2012, pp. 603-613.

87. Xuan, H., Wang, Y., Xu, Z., Hao, S., and Wang, X. : New bi-level programming model for routing and spectrum assignment in elastic optical network. In: Opt Quant Electron 49-2017, pp. 1-16.

88. Zhang, Y., Xin, J., and Li, X., and Huang, S. : Overview on routing and resource allocation based machine learning in optical networks. In: Journal of Optical Fiber Technology, pp. 1-21.

89. Zhou, Y., and Sun, Q., and Lin, S. : Link State Aware Dynamic Routing and Spectrum Allocation Strategy in Elastic Optical Networks. In: IEEE Access 2020, pp. 45071-45083.

90. Zhu, Q., and Yu, X., and Zhao, Y., and Zhang, J.: Layered Graph based Routing and Spectrum Assignment for Multicast in Fixed/Flex-grid Optical Networks. In: Journal of Asia Communications and Photonics Conference/International Conference on Information Photonics and Optical Communications 2020 (ACP/IPOC), pp. 1-3.

91. Zotkiewicz, M., Pioro, M., Ruiz, M., Klinkowski, M., and Velasco, L. : Optimization models for flexgrid elastic optical networks. In: 15th International Conference on Transparent Optical Networks (ICTON) 2013, pp. 1-4.