Elsevier, Amsterdam (2007) MATH Google Scholar Huygens, C.: Oeuvres completes. Soc. Hollondaise Sci. pp. 1888–1940, (1895) Malešević, B., Nenezić, M., Zhu, L., Banjac, B., Petrović, M.: Some new estimates of precision of Cusa–Huygens and Huygens approximations. Preprint ...