@article{DE_1985_21_9_a27,
     author = {A. S. Makin},
     title = {Summation of {Abel--Poisson} means of spectral decompositions corresponding to differential operators},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1633--1635},
     publisher = {mathdoc},
     volume = {21},
     number = {9},
     year = {1985},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1985_21_9_a27/}
}