@article{Pollak1987, author = {Pollak, R.A.}, title= {The two-sex problem with persistent unions: a generalization of the birth matrix-mating rule model}, year = {1987}, doi = {10.1016/0040-5809(87)90046-3}, journal = {Theoretical Population Biology}, volume = {32}, number = {2}, pages = {176--187}, }