@article{MTA_2019_4_2_a4,
     author = {Oleksandr Nakonechnyi and Yuri Podlipenko and Yury Shestopalov},
     title = {The minimax estimation method for a class of inverse {Helmholtz} transmission problems},
     journal = {Minimax theory and its applications},
     year = {2019},
     volume = {4},
     number = {2},
     zbl = {1427.49005},
     url = {http://geodesic.mathdoc.fr/item/MTA_2019_4_2_a4/}
}