1. Regulation of spermatogenesis in the adult mammal: Gonadotropins and androgens;Zirken,1993
2. Advantages of sexual reproduction;Crow;Dev Genet,1994
3. The evolution of sex and recombination;Charlesworth;Trends Ecol Evol,1989
4. Proterozoic and early Cambrian protists: Evidence for accelerating evolutionary tempo;Knoll;Proc Natl Acad Sci USA,1994