1. Kuper brush in the diagnosis of endometrial lesions;Butler;Lancet,1971
2. Intrauterine sponge biopsy: a new technique to screen for early intrauterine malignancy;Chatfield;Obstet Gynecol,1972
3. Histo-brush technique for endometrial tissue study;DeGirolami;Obstet Gynecol,1966
4. Suction-curette apparatus for endometrial biopsy;Novak;JAMA,1935
5. Endometrial aspiration biopsy;Abramson;Obstet Gynecol,1966