Bhave, N. S., and C. M. Deshpande. “Range of Diameters of a Bipartite Graph and Its Generalized 2-Partite Internal Complement”. The Journal of the Indian Mathematical Society, vol. 71, no. 1-4, Dec. 2004, pp. 207-19, https://informaticsjournals.com/index.php/jims/article/view/22043.