@article{KoppitzMusunthia2014,
  author    = {J{\"o}rg Koppitz and Tiwadee Musunthia},
  title     = {Maximal subsemigroups containing a particular semigroup},
  journal   = {Mathematica Slovaca},
  volume    = {64},
  number    = {6},
  pages     = {1369 -- 1380},
  doi       = {10.2478/s12175-014-0280-0},
  year      = {2014},
}