@ARTICLE{Ling+YamamotoETAL-Idensourlocatwo-:06, author = {Ling, L. and Yamamoto, M. and Hon, Y. C. and Takeuchi, T.}, title = {Identification of source locations in two-dimensional heat equations}, journal = {Inverse Problems}, fjournal = {Inverse Problems}, volume = {22}, number = {4}, pages = {1289-1305}, year = {2006}, }