Berry, Thomas G., and Venter, Sarel. "Integral formulae associated with non-parameter invariant multiple integral problems of arbitrary order in the calculus of variations.." Aequationes mathematicae 21 (1980): 200-224. <http://eudml.org/doc/182431>.
@article{Berry1980, author = {Berry, Thomas G., Venter, Sarel}, journal = {Aequationes mathematicae}, keywords = {independent integral; Euler-Lagrange equations}, pages = {200-224}, title = {Integral formulae associated with non-parameter invariant multiple integral problems of arbitrary order in the calculus of variations.}, url = {http://eudml.org/doc/182431}, volume = {21}, year = {1980}, }
TY - JOUR AU - Berry, Thomas G. AU - Venter, Sarel TI - Integral formulae associated with non-parameter invariant multiple integral problems of arbitrary order in the calculus of variations. JO - Aequationes mathematicae PY - 1980 VL - 21 SP - 200 EP - 224 KW - independent integral; Euler-Lagrange equations UR - http://eudml.org/doc/182431 ER -