Ayala FJ, Rich SM.  2000.  Genetic variation and the recent worldwide expansion of Plasmodium falciparum.. Gene. 261(1):161-70.

Ayala FJ, Escalante AA, Rich SM.  1999.  Evolution of Plasmodium and the recent origin of the world populations of Plasmodium falciparum.. Parassitologia. 41(1-3):55-68.

Rich SM, Licht MC, Hudson RR, Ayala FJ.  1998.  Malaria's Eve: evidence of a recent population bottleneck throughout the world populations of Plasmodium falciparum.. Proc Natl Acad Sci U S A. 95(8):4425-30.