@InCollection{1657:huygens,
  author = 	 {Christiaan Huygens},
  title = 	 {De Ratiociniis in Ludo Ale{\ae}},
  booktitle = 	 {Exercitationum Mathematicarum Libri Quinque: Quibus accedit {C}hristiani {H}ugenii Tractatus de Ratiociniis in Ale{\ae} Ludo},
  pages = 	 {517--524},
  publisher = {Ex officina Johannis Elsevirii},
  year = 	 {1657},
  editor = 	 {Schooten, Franciscus {\'a}},
  address = 	 {Lugd. Batav.},
}
