@article{10_1090_S0894_0347_10_00656_9,
     author = {Imanuvilov, Oleg and Uhlmann, Gunther and Yamamoto, Masahiro},
     title = {The {Calder\'on} problem with partial data in two dimensions},
     journal = {Journal of the American Mathematical Society},
     pages = {655--691},
     year = {2010},
     volume = {23},
     number = {3},
     doi = {10.1090/S0894-0347-10-00656-9},
     url = {http://geodesic.mathdoc.fr/articles/10.1090/S0894-0347-10-00656-9/}
}