@article{Rud:69c,
  journal = {J. Optimization Theory Appl.},
  volume = {4},
  title = {Irredundant optimization of a pseudo-{B}oolean function},
  author = {Rudeanu, Sergiu},
  year = {1969},
  fjournal = {Journal of Optimization Theory and Applications},
  pages = {253--259},
}