@MISC{TOPS_4.MIZ,
  AUTHOR = {Korni{\l}owicz, Artur},
  TITLE = {Miscellaneous Facts about Open Functions
    and Continuous Functions},
  SECTION1 = {Open functions},
  SECTION2 = {Continuous functions},
  DAY = {9},
  MONTH = {February},
  YEAR = {2010},
  ADDRESS1 = {Institute of Informatics\\University of Bia{\l}ystok\\Sosnowa 64, 15-887 Bia{\l}ystok\\Poland},
  SUMMARY = {In this article we give definitions of
  open functions and continuous functions
  formulated in terms of ``balls" of given topological spaces.}}
