@article{EP_2009_26_a6,
     author = {R. G. Novikov and N. N. Novikova},
     title = {On stable determination of potential by boundary measurements},
     journal = {ESAIM. Proceedings},
     pages = {94--99},
     publisher = {mathdoc},
     volume = {26},
     year = {2009},
     doi = {10.1051/proc/2009007},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.1051/proc/2009007/}
}