@article{a. o. mueck2001effect,
  title={The effect of medroxyprogesterone acetate and norethisterone on the estradiol stimulated proliferation in MCF-7 cells: comparison of continuous combined versus sequential combined estradiol/progestin treatment},
  author={c. lippert,h. seeger,d. wallwiener,a. o. mueck},
  journal={European Journal of Gynaecological Oncology},
  volume={22},
  number={5},
  pages={331--335},
  doi = {10.12892/ejgo200105331},
  year={2001}
}