@article{KVANT_2018_8_a2,
     author = {S. V. Dvoryaninov},
     title = {Potential well and tea-spoon principle},
     journal = {Kvant},
     pages = {27--29},
     publisher = {mathdoc},
     number = {8},
     year = {2018},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/KVANT_2018_8_a2/}
}