?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.aulast=Farkas&rft.au=+Farkas+Gyula&rft.aufirst=Gyula&rft.issn=0563-0592&rft.volume=34&rft.atitle=One+possible+hypothesis+of+the+menarcheal+seasonality&rft.title=Acta+biologica&rft.date=1988&rft.pages=133-138&rft.issue=1-4&rft.genre=article