@article{GDZPPN002105829,
title = {The weak type L1 convergence of eigenfunction expansions for pseudodifferential operators.},
journal = {Inventiones mathematicae},
volume = {93},
year = {1988},
pages = {421-454},
zbl = {0678.35096},
url = {http://dml.mathdoc.fr/item/GDZPPN002105829}
}
Sogge, C.D.; Christ, F.M. The weak type L1 convergence of eigenfunction expansions for pseudodifferential operators.. Inventiones mathematicae, Tome 93 (1988) pp. 421-454. http://gdmltest.u-ga.fr/item/GDZPPN002105829/