TY  - BOOK
AU  - Calin, Ovidiu
AU  - Chang, Der-Chen
TI  - Sub-riemannian geometry: general theory and examples
SN  - 9780521897303
U1  - 516.373 
PY  - 2009///
CY  - Cambridge
PB  - Cambridge University Press
KW  - Geometry, Riemannian
ER  -