Shadi Atalla Saed Tarapiah Mahmoud El Hendy Kamarul Faizal Bin Hashim Smart Algorithms for Hierarchical Clustering in Optical Network. 2016 8 Int. J. Commun. Networks Inf. Secur. 2 http://www.ijcnis.org/index.php/ijcnis/article/view/1943 db/journals/ijcnis/ijcnis8.html#AtallaTHH16