1. The Ljubljana abortion study: 1971–1973,1974
2. Complications after interruption of pregnancy due to the method used-classical or aspiration;Atanasov;Akušerstvo i ginekologija (Sofia),1971
3. Early somatic complications of abortion operations;Atterfelt;Läkartidningen,1972
4. Vacum aspiration, using paracervical block for legal abortion as an outpatient procedure up to the 12 week of pregnancy;Berić;Lancet,1971
5. Berić, B. and Kupresanin, M. (1971b). Experience with the suction method with pericervical block for the legal interruption of pregnancy up to the twelfth week. Proc. 7th World Congr. Fert. Steril, Tokyo -Kyoto, 368.