@article{Montecalvo12,
  title = {Some Constructions of General Covering Designs},
  author = {Federico Montecalvo},
  year = {2012},
  url = {http://www.combinatorics.org/ojs/index.php/eljc/article/view/v19i3p28},
  researchr = {https://researchr.org/publication/Montecalvo12},
  cites = {0},
  citedby = {0},
  journal = {Electr. J. Comb.},
  volume = {19},
  number = {3},
  pages = {28},
}