@MISC{WAYBEL10.MIZ,
  AUTHOR = {Bancerek, Grzegorz},
  TITLE = {Closure Operators and Subalgebras},
  NOTE = {This work has been partially supported by
   the Office of Naval Research Grant N00014-95-1-1336.},
  SECTION1 = {Preliminaries},
  SECTION2 = {The lattice of closure operators},
  SECTION3 = {The lattice of closure systems},
  SECTION4 = {Isomorphism between closure operators and closure systems},
  SECTION5 = {Isomorphism between closure operators preserving directed sups and subalgebras},
  DAY = {15},
  MONTH = {January},
  YEAR = {1997},
  ADDRESS1 = {Warsaw University\\Bia{\l}ystok}}

