@article{01370674, title = {Regularized functional calculi, semigroups, and cosine functions for pseudodifferential operators.}, journal = {Abstract and Applied Analysis}, volume = {2}, year = {1997}, pages = {121-136}, doi = {10.1155/S1085337597000304}, zbl = {0937.47015}, language = {en}, url = {http://dml.mathdoc.fr/item/01370674} }
deLaubenfels, Ralph; Lei, Yansong. Regularized functional calculi, semigroups, and cosine functions for pseudodifferential operators.. Abstract and Applied Analysis, Tome 2 (1997) pp. 121-136. doi : 10.1155/S1085337597000304. http://gdmltest.u-ga.fr/item/01370674/