TY  - JOUR
AU  - Spencer, James D.
TI  - Relations Between Boundary Value Functions for a Nonlinear Differential Equation and its Variational Equations*
JO  - Canadian mathematical bulletin
PY  - 1975
SP  - 269
EP  - 276
VL  - 18
IS  - 2
UR  - http://geodesic.mathdoc.fr/articles/10.4153/CMB-1975-051-8/
DO  - 10.4153/CMB-1975-051-8
ID  - 10_4153_CMB_1975_051_8
ER  -