Sibling-substitution-based BDD minimization using don't cares. Hong, Y., Beerel, P. A., Burch, J. R., & McMillan, K. L. IEEE Trans. on CAD of Integrated Circuits and Systems, 19(1):44–55, 2000.  
Paper  doi  bibtex   @article{DBLP:journals/tcad/HongBBM00,
  author    = {Youpyo Hong and
               Peter A. Beerel and
               Jerry R. Burch and
               Kenneth L. McMillan},
  title     = {Sibling-substitution-based {BDD} minimization using don't cares},
  journal   = {{IEEE} Trans. on {CAD} of Integrated Circuits and Systems},
  volume    = {19},
  number    = {1},
  pages     = {44--55},
  year      = {2000},
  url       = {https://doi.org/10.1109/43.822619},
  doi       = {10.1109/43.822619},
  timestamp = {Sat, 20 May 2017 01:00:00 +0200},
  biburl    = {https://dblp.org/rec/bib/journals/tcad/HongBBM00},
  bibsource = {dblp computer science bibliography, https://dblp.org}
} 
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