@article{oai:tsukuba.repo.nii.ac.jp:00015815, author = {Dascalescu, S. and Nastaasescu, C. and Raianu, S. and Van, Oystaeyen F.}, issue = {2}, journal = {Tsukuba Journal of Mathematics}, month = {Dec}, pages = {395--407}, title = {Graded coalgebras and Morita-Takeuchi contexts}, volume = {19}, year = {1995} }