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

Rich SM, Ferreira MU, Ayala FJ.  2000.  The origin of antigenic diversity in Plasmodium falciparum.. Parasitol Today. 16(9):390-6.

Rich SM, Ayala FJ.  2000.  Population structure and recent evolution of Plasmodium falciparum.. Proc Natl Acad Sci U S A. 97(13):6994-7001.

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.

Rich SM, Ayala FJ.  1998.  The recent origin of allelic variation in antigenic determinants of Plasmodium falciparum.. Genetics. 150(1):515-7.

Rich SM, Rosenthal BM, Telford SR, Spielman A, Hartl DL, Ayala FJ.  1997.  Heterogeneity of the internal transcribed spacer (ITS-2) region within individual deer ticks.. Insect Mol Biol. 6(2):123-9.

Rich SM, Hudson RR, Ayala FJ.  1997.  Plasmodium falciparum antigenic diversity: evidence of clonal population structure.. Proc Natl Acad Sci U S A. 94(24):13040-5.