@article{MauPur:64a,
  journal = {Studia Univ. Babe\c s-Bolyai, Ser. Math.- Phys.},
  title = {Despre o topologie in mul\c timea rela\c tiilor binare},
  author = {Maurer, I. and Purdea, Ioan},
  year = 1964,
  pages = {21--24},
  number = {1},
}