@article{COCV_2002__8__1029_0,
     author = {Xu, Xingwang and Yang, Paul C.},
     title = {On a fourth order equation in {3-D}},
     journal = {ESAIM: Control, Optimisation and Calculus of Variations},
     pages = {1029--1042},
     publisher = {EDP-Sciences},
     volume = {8},
     year = {2002},
     doi = {10.1051/cocv:2002023},
     mrnumber = {1932985},
     zbl = {1071.53526},
     language = {en},
     url = {http://www.numdam.org/articles/10.1051/cocv:2002023/}
}