?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.au=Tsukahara%2C+Y&rft.aulast=Tsukahara&rft.aufirst=Y&rft.issue=2&rft.volume=125&rft.date=April+2008&rft.issn=0931-2668&rft.atitle=Effect+of+parental+genotypes+and+paternal+heterosis+on+litter+traits+in+crossbred+goats&rft.title=Journal+of+Animal+Breeding+%26+Genetics&rft.pages=84-88&rft.genre=article