?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.au=Petke%2C+J&rft.aufirst=J&rft.aulast=Petke&rft.date=June+2018&rft.atitle=Genetic+Improvement+of+Software%3A+a+Comprehensive+Survey&rft.volume=22&rft.issue=3&rft.issn=1941-0026&rft.pages=415-432&rft.title=IEEE+Transactions+on+Evolutionary+Computation&rft.genre=article