@article{107148,
author = {Jaroslav Krbi\v la},
title = {Neobkhodimye i dostatochnye usloviia nesopriazhennosti differentsial'nogo uravneniia $y''=qy$},
journal = {Archivum Mathematicum},
volume = {018},
year = {1982},
pages = {221-230},
zbl = {0519.34026},
mrnumber = {685808},
language = {ru},
url = {http://dml.mathdoc.fr/item/107148}
}
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