?url_ver=Z39.88-2004&rft_id=https%3A%2F%2Fdx.doi.org%2F10.36380%2Fscil.2020.wvj41&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.au=Nam%2C+N.+H.&rft.aufirst=N.+H.&rft.aulast=Nam&rft.issue=3&rft.volume=10&rft.issn=23224568+(ISSN)&rft.pages=320-324&rft.date=25+September+2020&rft.title=World's+Veterinary+Journal&rft.atitle=Associated+Factors+for+Farrowing+Duration+in+Sows+with+Natural+Parturition+in+Intensive+Conditions&rft.genre=article