LEA

BibTex

@article{BPS-1996,
  author={Brightwell, Graham and Pr{\"o}mel, Hans J├╝rgen and Steger, Angelika},
  title={The Average Number of Linear Extensions of a Partial Order},
  journal={Journal of Combinatorial Theory, Series A},
  volume={73},
  number={2},
  year={1996},
  month={Feb},
  pages={193-206}
}