@article{ZNSL_2019_478_a7,
     author = {Li Lu},
     title = {$Gr$-injective modules and $gr$-projective modules over $G$-graded commutative rings},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {172--193},
     publisher = {mathdoc},
     volume = {478},
     year = {2019},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_2019_478_a7/}
}