@article{NegSul:76,
  journal = {Econom. Comp. Econom. Cybernet. Stud. Res.},
  title = {On fuzzy mathematical programming and tolerances in planning},
  author = {Negoi{\c{t}}{\u{a}}, Constantin Virgil and Sularia, Mircea},
  year = {1976},
  fjournal = {Economic Computation and Economic Cybernetics Studies and
              Research},
  pages = {3--15},
  number = {1},
}