[MathOuvrage]
Curved spaces
/ Wilson, P. M. H..
-Cambridge : Cambridge university Press, 2008. - x, 186 p. ; 24 cm
ISBN 9780521713900
[IremOuvrage]
Elementary geometry
/ Agricola, Ilka ; Friedrich, Thomas ; Trad. Spain, Philip G..
-Providence RI : American mathematical Society, 2008. - xi-243 p. ; 22 cm
ISBN 9780821843475