@article{oai:tsukuba.repo.nii.ac.jp:00015857, author = {Y-F.S, Petermann}, issue = {1}, journal = {Tsukuba Journal of Mathematics}, month = {Jun}, pages = {241--248}, title = {Existence of all the asymptotic λ-th means for certain arithmetical convolutions}, volume = {12}, year = {1988} }