@article{EJDE_2010__2010__a52,
     author = {Kawagishi, Masaki},
     title = {A {Holmgren} type theorem for partial differential equations whose coefficients are {Gevrey} functions},
     journal = {Electronic Journal of Differential Equations},
     publisher = {mathdoc},
     volume = {2010},
     year = {2010},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/EJDE_2010__2010__a52/}
}