SpringerLink (Online service), Lagarias, J. C., & Ferguson, S. (2011). The Kepler conjecture: The Hales- Ferguson proof by Thomas Hales, Samuel Ferguson. Birkhäuser.
Citazione stile Chigago Style (17a edizione)SpringerLink (Online service), Jeffrey C. Lagarias, e Samuel Ferguson. The Kepler Conjecture: The Hales- Ferguson Proof by Thomas Hales, Samuel Ferguson. New York: Birkhäuser, 2011.
Citatione MLA (9a ed.)SpringerLink (Online service), et al. The Kepler Conjecture: The Hales- Ferguson Proof by Thomas Hales, Samuel Ferguson. Birkhäuser, 2011.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.