IvorI.Grattan-GuinnessIvorI., The "Ecole Polytechnique", 1794-1850: Differences over Educational Purpose and Teaching Practice, „The American Mathematical Monthly”, 3, 2005, s. 233–250, DOI: 10.2307/30037440, JSTOR: 30037440 [dostęp 2016-09-20].1 stycznia
IvorI.Grattan-GuinnessIvorI., The "Ecole Polytechnique", 1794-1850: Differences over Educational Purpose and Teaching Practice, „The American Mathematical Monthly”, 3, 2005, s. 233–250, DOI: 10.2307/30037440, JSTOR: 30037440 [dostęp 2016-09-20].1 stycznia