van Gent D, Sharp P, Morgan K, Kalsheker N (November 2003). "Serpins: structure, function and molecular evolution". Int. J. Biochem. Cell Biol. 35 (11): 1536–47. doi:10.1016/S1357-2725(03)00134-1. PMID12824063.
Stephenson DC, Leslie MV, Low BG, Newton GR, Hansen PJ, Bazer FW (October 1989). "Secretion of the major progesterone-induced proteins of the sheep uterus by caruncular and intercaruncular endometrium of the pregnant ewe from days 20-140 of gestation". Domest. Anim. Endocrinol. 6 (4): 349–62. doi:10.1016/0739-7240(89)90029-5. PMID2620505.
Liu WJ, Hansen PJ (February 1995). "Progesterone-induced secretion of dipeptidyl peptidase-IV (cluster differentiation antigen-26) by the uterine endometrium of the ewe and cow that costimulates lymphocyte proliferation". Endocrinology. 136 (2): 779–87. doi:10.1210/endo.136.2.7835310. PMID7835310.
Hansen PJ, Newton GR (January 1988). "Binding of immunoglobulins to the major progesterone-induced proteins secreted by the sheep uterus". Arch. Biochem. Biophys. 260 (1): 208–17. doi:10.1016/0003-9861(88)90442-0. PMID3341741.
Hansen PJ (October 1998). "Regulation of uterine immune function by progesterone--lessons from the sheep". J. Reprod. Immunol. 40 (1): 63–79. doi:10.1016/S0165-0378(98)00035-7. PMID9862257.
van Gent D, Sharp P, Morgan K, Kalsheker N (November 2003). "Serpins: structure, function and molecular evolution". Int. J. Biochem. Cell Biol. 35 (11): 1536–47. doi:10.1016/S1357-2725(03)00134-1. PMID12824063.
Stephenson DC, Leslie MV, Low BG, Newton GR, Hansen PJ, Bazer FW (October 1989). "Secretion of the major progesterone-induced proteins of the sheep uterus by caruncular and intercaruncular endometrium of the pregnant ewe from days 20-140 of gestation". Domest. Anim. Endocrinol. 6 (4): 349–62. doi:10.1016/0739-7240(89)90029-5. PMID2620505.
Liu WJ, Hansen PJ (February 1995). "Progesterone-induced secretion of dipeptidyl peptidase-IV (cluster differentiation antigen-26) by the uterine endometrium of the ewe and cow that costimulates lymphocyte proliferation". Endocrinology. 136 (2): 779–87. doi:10.1210/endo.136.2.7835310. PMID7835310.
Hansen PJ, Newton GR (January 1988). "Binding of immunoglobulins to the major progesterone-induced proteins secreted by the sheep uterus". Arch. Biochem. Biophys. 260 (1): 208–17. doi:10.1016/0003-9861(88)90442-0. PMID3341741.
Hansen PJ (October 1998). "Regulation of uterine immune function by progesterone--lessons from the sheep". J. Reprod. Immunol. 40 (1): 63–79. doi:10.1016/S0165-0378(98)00035-7. PMID9862257.