@MISC{GRFUNC_1.MIZ,
  AUTHOR = {Byli\'nski, Czes{\l}aw},
  TITLE = {Graphs of Functions},
  DAY = {14},
  MONTH = {April},
  YEAR = {1989},
  ADDRESS1 = {Warsaw University\\Bia{\l}ystok},
  SUMMARY = {   The graph of a function is defined in \cite{FUNCT_1.ABS}.
In this paper the graph of a function is redefined as a Relation.
Operations on functions are interpreted as the corresponding operations 
on relations. Some theorems about graphs of functions are proved.}}

