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@article{MS2_1982__50_166793, author = {Gustaf Gripenberg}, title = {Volterra integral operators and logarithmic convexity.}, journal = {Mathematica Scandinavica}, pages = {209--220}, publisher = {mathdoc}, volume = {50}, year = {1982}, zbl = {0495.45012}, url = {http://geodesic.mathdoc.fr/item/MS2_1982__50_166793/} }
Gustaf Gripenberg. Volterra integral operators and logarithmic convexity.. Mathematica Scandinavica, Tome 50 (1982), pp. 209-220. http://geodesic.mathdoc.fr/item/MS2_1982__50_166793/