In order to classify a finite group using its elements orders, the order classes are defined. This partition determines the number of elements for each order. The aim of this paper is to find the order classes of 2-generator -groups of class 2. The results obtained here are supported by Groups, Algorithm and Programming (GAP).
"The Order Classes of 2-Generator -Groups." J. Appl. Math. 2016 1 - 6, 2016. https://doi.org/10.1155/2016/8435768