
 References for Huygens 
  P Dupont and C S Roero, The treatise 'De ratiociniis in ludo aleae' of Christiaan Huygens, with the 'Annotationes' of Jakob Bernoulli ('Ars conjectandi', Part I), presented in an Italian translation, with historical and critical commentary and modern solutions (Italian), Mem. 
  L Giacardi, On the approximate calculation of the length of the circumference in Huygens and in Lambert, Rend. 
  I Schneider, Christiaan Huygens' contribution to the development of a calculus of probabilities, Janus 67 (4) (1980), 269279. 
 wwwgroups.dcs.stand.ac.uk /~history/References/Huygens.html (1074 words) 
