TY - JOUR AU - B. M. Levitan TI - On the asymptotic behavior of a spectral function and expansion in eigenfunctions of the equation JO - Trudy Moskovskogo matematičeskogo obŝestva PY - 1955 SP - 237 EP - 290 VL - 4 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/MMO_1955_4_a3/ LA - ru ID - MMO_1955_4_a3 ER -