@article{DAN_1980_250_6_a3,
     author = {V. Ya. Ivrii},
     title = {On the second term of the spectral asymptotics for the {Laplace--Beltrami} operator on manifolds with boundary and for elliptic operators acting in fiberings},
     journal = {Doklady Akademii Nauk},
     pages = {1300--1302},
     publisher = {mathdoc},
     volume = {250},
     number = {6},
     year = {1980},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1980_250_6_a3/}
}