@article{BusChi:05,
  journal = {Discrete Math.},
  volume = {296},
  title = {{$LM_n$}-algebra of fractions and maximal {$LM_n$}-algebra of
           fractions},
  year = {2005},
  fjournal = {Discrete Mathematics},
  pages = {143--165},
  number = {2-3},
  author = {Bu{\c{s}}neag, Dumitru and Chirte{\c{s}}, Florentina},
}