@article{ZNSL_2002_285_a9,
     author = {Yu. A. Lavrov and V. D. Luk'yanov},
     title = {On frequencies of free oscillations of a truncated spherical cone covered with a thin elastic spherical shell},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {124--134},
     publisher = {mathdoc},
     volume = {285},
     year = {2002},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_2002_285_a9/}
}