Chambers GM, Botha W, Reilly N, Black E, Kingston D, Austin MP. The clinical performance and cost-effectiveness of two psychosocial assessment models in maternity care: the perinatal integrated psychosocial assessment study. Women Birth. 2021 Jun 4. doi: 10.1016/j.wombi.2021.05.007. doi: 10.1016/j.wombi.2021.05.007
Nguyen USDT, Rothman KJ, Demissie S, Jackson DJ, Lang JM, Ecker JL. Transfers among women intending a birth center delivery in the San Diego birth center study. J Midwifery Womens Health. 2009 Mar 1;54(2):104-10.