J. L. Rebola and A. D. Cartaxo,  "Optimizing crosstalk suppression in bidirectional weakly-coupled multicore fiber spans by resorting to mid-span isolators ", in 2025 25th Anniversary Int. Conf. on Transparent Optical Networks (ICTON),  Crina Cojocaru, Salvatore Spadaro, and Marian Marciniak, Ed., Barcelona, Spain, IEEE, 2025