Journal of Obstetrics and Gynaecology: 1985, vol: 5, issue:
1)- G C Budden, N Q Walford, D F Hawkins. Intra-uterine granulation tissue with an intra-uterine contraceptive device in situ for 16 years.Journal of obstetrics and gynaecology. 1985, 5 (3): 190-1