@article{SM_2005_196_9_a3,
     author = {A. Yu. Popov and I. V. Tikhonov},
     title = {Exponential solubility classes in a problem for the~heat equation with a~non-local condition for the~time averages},
     journal = {Sbornik. Mathematics},
     pages = {1319--1348},
     year = {2005},
     volume = {196},
     number = {9},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_2005_196_9_a3/}
}