@article{Jacobson2008,
author = {Jacobson MJ, Lin G, Raphael B, Andreadis J, Johnson EA.},
title = {Analysis of neurotoxin cluster genes in Clostridium botulinum strains producing botulinum neurotoxin serotype A subtypes.},
journal = {Appl Environ Microbiol.},
year = {2008},
doi = {10.1128/AEM.02828-07},
pmid = {18326685}
}

@article{Smith2007,
author = {Smith TJ, Hill KK, Foley BT, Detter JC, Munk AC, Bruce DC, Doggett NA, Smith LA, Marks JD, Xie G, Brettin TS.},
title = {Analysis of the neurotoxin complex genes in Clostridium botulinum A1-A4 and B1 strains: BoNT/A3, /Ba4 and /B1 clusters are located within plasmids.},
journal = {PLoS ONE},
year = {2007},
doi = {10.1371/journal.pone.0001271},
pmid = {18060065}
}