Couceiro Miguel;  Haddad Lucien;  Schölzel Karsten;  Waldhauser Tamás: A solution to a problem of D. Lau: Complete classification of intervals in the lattice of partial Boolean clones.
  JOURNAL OF MULTIPLE-VALUED LOGIC AND SOFT COMPUTING, 28 (1).  pp. 47-58.  ISSN 1542-3980 (2017)