Record added by Jurg Ott (the original Rockefeller list)
allows drawing pedigrees with a difficult structure, those containing consanguinity loops, and those individuals with multiple mates or several related families
A Kirichenko
http://mga.bionet.nsc.ru/PedigreeQuery/PedigreeQuery.html (in Russian)
A Kirichenko (2003), “PedigreeQuery - software for pedigree drawing” (abstract), American Journal of Human Genetics, suppl