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SAFETY OF POSTABORTION STERILISATION COMPARED WITH INTERVAL STERILISATION A Controlled Study

S. Ratnam, S. Chew, M. Belsey, 1979, The Lancet.

Psychological Sequelae of Sterilization in Women in Singapore

M. Cheng, J. Cheong, S. S. Ratnam, 1977, International journal of gynaecology and obstetrics: the official organ of the International Federation of Gynaecology and Obstetrics.

Psychosocial sequelae of abortion and sterilization: a controlled study of 200 women randomly allocated to either a concurrent or interval abortion and sterilization.

A. Pinol, S. Ratnam, M. Cheng, 2010, Asia-Oceania journal of obstetrics and gynaecology.