?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.au=Vater%2C+Joachim&rft.aulast=Vater&rft.aufirst=Joachim&rft.issue=12&rft.volume=68&rft.date=December+2002&rft.issn=0099-2240&rft.atitle=Matrix-assisted+laser+desorption+ionization--time+of+flight+mass+spectrometry+of+lipopeptide+biosurfactants+in+whole+cells+and+culture+filtrates+of+Bacillus+subtilis+C-1+isolated+from+petroleum+sludge.&rft.title=Applied+and+environmental+microbiology&rft.pages=6210-9&rft.genre=article