1. Facts illustrating a disease peculiar to the female children of negro slaves;Archer;Med Reposit,1810
2. Ein Zwillings parchen mit Zwei Vatem (Nachgewiesence Uberschwangerung beim Menschen);Geyer;Arch Rassenbiol,1940
3. Twins with two different fathers identified by HLA;Terasaki;N Engl J Med,1978
4. Human chromosomes manual of basic technique;Verma,1989
5. Nonrandom distribution of various sizes of human Y chromosomes in different ethnic group;Verma;Ann Hum Biol,1987