1. Patterns of bleeding associated with the use of steroidal contraceptives;Gray,1980
2. Some methodological problems in the analysis of menstrual data;Burch;Int. J. Fertility,1967
3. Periodogram analysis of menstrual cycles;Pochobradsky;J. Interdisciplinary Cycle Res.,1970
4. An approach to the analysis of menstrual patterns in the clinical evaluation of contraceptives;Rodriguez;Stud. Fam. Plann.,1976
5. Patterns and Perceptions of Menstruation,1983