M. Danfulani, G. H. Yunusa, S. M. Ma'aji, S. A. Sa'idu, and M. A. Musa, “Tubal abnormalities on hysterosalphingography in primary and secondary infertility in Sokoto, Northwestern-Nigeria”, Asian J Med Sci, vol. 6, no. 2, pp. 47–50, Sep. 2014.