article 1994 Estrogen dependence of cholinergic systems that regulate lordosis in cycling female rats ·doi:10.1016/0091-3057(94)90546-0
article 1992 The effect of estrogen treatment on scopolamine inhibition of lordosis ·doi:10.1016/0018-506x(92)90006-h
article 1989 Scopolamine inhibition of lordosis in naturally cycling female rats ·doi:10.1016/0031-9384(89)90301-6