@article{FAA_1980_14_2_a13,
     author = {P. Ya. Grozman},
     title = {Classification of bilinear invariants of operators on tensor fields},
     journal = {Funkcionalʹnyj analiz i ego prilo\v{z}eni\^a},
     pages = {58--59},
     publisher = {mathdoc},
     volume = {14},
     number = {2},
     year = {1980},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/FAA_1980_14_2_a13/}
}