@article{GDZPPN002393816, title = {Summability of Eigenfunction Expansions.}, journal = {Mathematische Zeitschrift}, volume = {85}, year = {1964}, pages = {321-335}, zbl = {0122.30906}, url = {http://dml.mathdoc.fr/item/GDZPPN002393816} }
Minakshisundaram, S. Summability of Eigenfunction Expansions.. Mathematische Zeitschrift, Tome 85 (1964) pp. 321-335. http://gdmltest.u-ga.fr/item/GDZPPN002393816/