TY  - RPRT
TI  - Bleeding problems and progestogen-only contraception.
AU  - Charlotte Porter
AU  - Margaret C P Rees
PY  - 2002
DO  - 10.1783/147118902101196784
UR  - https://pubmed.ncbi.nlm.nih.gov/12419054/
ID  - 12419054
ER  -