[1] Cohen M, Montgomery S. Group-graded rings, smash products, and group actions[J]. Transactions of American Mathematical Society, 1987, 282(1): 237-258. DOI:10.2307/2000371.
[2] Marcelo M S A, Batista E. Enveloping actions for partial Hopf actions[J]. Communications in Algebra, 2010, 38(8): 2872-2902. DOI:10.1080/00927870903095582.
[3] Alvares E R, Alves M M S, Batista E. Partial Hopf module categories[J]. Journal of Pure and Applied Algebra, 2013, 217(8): 1517-1534. DOI:10.1016/j.jpaa.2012.11.008.
[4] Cibils C, Solotar A. Galois coverings, Morita equivalence and smash extensions of categories over a field[J]. Documenta Mathematica, 2006, 11: 143-159.
[5] St(~overa)nescu A, Stefan D. Cleft comodule category[J]. Communications in Algebra, 2013, 41(5): 1697-1726. DOI:10.1080/00927872.2011.649506.
[6] Montgomery S. Hopf algebras and their actions on rings[M]. Providence, RI, USA: American Mathematical Society, 1993:101-117.
[7] Blattner R J, Cohen M, Montgomery S. Crossed products and inner actions of Hopf algebras[J]. Transactions of the American Mathematical Society, 1986, 298(2):671-711. DOI:10.2307/2000643.
[8] Stanescu A. On Hopf-Galois extensions of linear categories[J]. Analele Universitatii “Ovidius” Constanta-Seria Mathematica, 2012, 20(3): 111-130. DOI:10.2478/v10309-012-0059-7.