[1] M. Channegowda, P. Kostecki, N. Efstathiou, S. Azodolmolky, R. Nejabati, P. Kaczmarek, A. Autenrieth, J. P. Elbers, and D. Simeonidou, in Proceedings of ECOC 2012 Tu.1.D.2 (2012).

[2] W. Sun, P. Li, C. Li, and W. Hu, Chin. Opt. Lett. 11, 010601 (2013).

[3] Z. Du, Y. Lu, and Y. Ji, Chin. Opt. Lett. 10, 020604 (2012).

[4] Y. Lee, G. Bernstein, N. So, T. Y. Kim, K. Shiomoto, and O. G. Dios, "draft-lee-cross-stratum-optimizationdatacenter-00," IETF draft (Mar. 3, 2011).

[5] H. Yang, Y. Zhao, J. Zhang, S. Wang, W. Gu, Yi Lin, and Young Lee, in Proceedings of OFC/NFOEC 2012 JTh2A.38 (2012).

[6] W. Huang, M. Tacca, N. So, M. Razo, and A. Fumagalli, in Proceedings of ISPA 523 (2012).

[7] J. Rubio-Loyola, A. Galis, A. Astorga, J. Serrat, L. Lefevre, A. Fischer, A. Paler, and H. Meer, IEEE Commun. Mag. 49, 84 (2011).

[8] L. Liu, T. Tsuritani, I. Morita, H. Guo, and J. Wu, Opt. Express 19, 26578 (2011).

[9] S. Das, G. Parulkar, and N. McKeown, in Proceedings of OFC/NFOEC OTuG1 (2010).

[10] H. Yang, Y. Zhao, J. Zhang, S. Wang, W. Gu, J. Han, Y. Lin, and Y. Lee, in Proceedings of OFC/NFOEC NTu3F.7 (2013).

[11] L. Liu, R. Casellas, T. Tsuritani, I. Morita, R. Martinez, and R. Munoz, in Proceedings of OFC/NFOEC OM3G.2 (2012).

[12] J. Zhang, Y. Zhao, H. Yang, Y. Ji, H. Li, Y. Lin, G. Li, J. Han, Y. Lee, and T. Ma, in Proceedings of OFC/NFOEC PDP5B.1 (2013).

[13] J. Zhang, J. Zhang, Y. Zhao, H. Yang, X. Yu, L. Wang, and X. Fu, Opt. Express 21, 1364 (2013).

[14] J. Zhang, Y. Zhao, X. Chen, Y. Ji, M. Zhang, H.Wang, Y. Zhao, Y. Tu, Z. Wang, and H. Li, Opt. Express 19, B746 (2011).