@article{SM_2001_192_5_a4,
     author = {Z. Yu. Fazullin and Kh. Kh. Murtazin},
     title = {Regularized trace of a~two-dimensional harmonic oscillator},
     journal = {Sbornik. Mathematics},
     pages = {725--761},
     publisher = {mathdoc},
     volume = {192},
     number = {5},
     year = {2001},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_2001_192_5_a4/}
}