@misc{indiciaeeb3d40f24a32,
  title = {An improved beta-galactosidase alpha-complementation system for molecular cloning in Bacillus subtilis.},
  author = {P Haima and D van Sinderen and S Bron and G Venema},
  year = {1990},
  doi = {10.1016/0378-1119(90)90133-c},
  url = {https://pubmed.ncbi.nlm.nih.gov/2121609/},
  note = {Source identifier: 2121609}
}