TY - JOUR AU - Lopes, Orlando TI - Nonlocal variational problems arising in long wave propagation JO - ESAIM: Control, Optimisation and Calculus of Variations PY - 2000 SP - 501 EP - 528 VL - 5 PB - EDP-Sciences UR - http://www.numdam.org/item/COCV_2000__5__501_0/ LA - en ID - COCV_2000__5__501_0 ER -