"Re-evaluation of the linkage relationship between chromosome 11p loci and the gene for bipolar affective disorder in the Old Order Amish" by John R. Kelsoe, Edward I. Ginns, Janice A. Egeland, et. al.
"Single-sperm typing: Determination of genetic distance between the G _-globin and parathyroid hormone loci by using the polymerase chain reaction and allele-specific oligomers" by Cui, Li, Goradia, et. al.
"Direct electrophoretic detection of the allelic state of single DNA molecules in human sperm by using the polymerase chain reaction" by Li, Cui and Arnheim