Complexity and approximation of an area packing problem. Hurkens, C. A. J., Lodi, A., Martello, S., Monaci, M., & Woeginger, G. J. Optim. Lett., 6(1):1–9, 2012.
Complexity and approximation of an area packing problem [link]Paper  doi  bibtex   
@article{DBLP:journals/ol/HurkensLMMW12,
  author    = {Cor A. J. Hurkens and
               Andrea Lodi and
               Silvano Martello and
               Michele Monaci and
               Gerhard J. Woeginger},
  title     = {Complexity and approximation of an area packing problem},
  journal   = {Optim. Lett.},
  volume    = {6},
  number    = {1},
  pages     = {1--9},
  year      = {2012},
  url       = {https://doi.org/10.1007/s11590-010-0246-2},
  doi       = {10.1007/s11590-010-0246-2},
  timestamp = {Fri, 03 Jul 2020 01:00:00 +0200},
  biburl    = {https://dblp.org/rec/journals/ol/HurkensLMMW12.bib},
  bibsource = {dblp computer science bibliography, https://dblp.org}
}

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