@article{BusPic:06c,
  journal = {J. Mult.-Valued Logic Soft Comput.},
  volume = {12},
  title = {On the lattice of filters of a pseudo-{BL} algebra},
  year = {2006},
  fjournal = {Journal of Multiple-Valued Logic and Soft Computing},
  pages = {217--248},
  number = {3-4},
  author = {Bu{\c{s}}neag, Dumitru and Piciu, Dana},
}