@article{IM2_1980_15_1_a1,
     author = {S. V. Vostokov},
     title = {A~norm pairing in formal modules},
     journal = {Izvestiya. Mathematics },
     pages = {25--51},
     publisher = {mathdoc},
     volume = {15},
     number = {1},
     year = {1980},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/IM2_1980_15_1_a1/}
}