Virant-Klun, I., Bauer, C., Stahlberg, A., Kubista, M., Skutella, T. Human oocyte maturation in vitro is improved by co-culture with cumulus cells from mature oocytes. Reproductive BioMedicine Online, 36(5): 508-523, 2018. doi: 10.1016/j.rbmo.2018.01.011. ISSN 1472-6483.