A. M. Umar, U. E. Onwuasoanya, E. U. Oyibo, A. Dahiru, and I. A. Mungadi, “The pattern of urine cytology among patients with clinical diagnosis of bladder tumor in a tertiary hospital northwest Nigeria”, Int Surg J, vol. 6, no. 10, pp. 3521–3524, Sep. 2019.