@article{10_4153_CJM_1976_123_8,
     author = {May, C. P.},
     title = {Saturation and {Inverse} {Theorems} for {Combinations} of a {Class} of {Exponential-Type} {Operators}},
     journal = {Canadian journal of mathematics},
     pages = {1224--1250},
     year = {1976},
     volume = {28},
     number = {6},
     doi = {10.4153/CJM-1976-123-8},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CJM-1976-123-8/}
}