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)