@article{01779125, title = {The averaging of nonlocal Hamiltonian structures in Whitham's method.}, journal = {International Journal of Mathematics and Mathematical Sciences}, volume = {30}, year = {2002}, pages = {399-434}, doi = {10.1155/S0161171202106120}, zbl = {1046.70015}, language = {en}, url = {http://dml.mathdoc.fr/item/01779125} }
Maltsev, Andrei Ya. The averaging of nonlocal Hamiltonian structures in Whitham's method.. International Journal of Mathematics and Mathematical Sciences, Tome 30 (2002) pp. 399-434. doi : 10.1155/S0161171202106120. http://gdmltest.u-ga.fr/item/01779125/