by Saeav, A.S., Imade, G.E., Aliyu, M.E., Aisien, A.O., Ujah, I.A.O., Nwokedi, E.E.
Published in International journal of gynecology and obstetrics (2000)

by Sagay, A.S., Imade, G.E., Nwokedi, E.E.
Published in International journal of gynecology and obstetrics (01.08.1999)