@article{MZM_1981_29_6_a0,
     author = {\`E. T. Avanesov and K. K. Billevich},
     title = {Fundamental units of cubic fields of positive discriminant},
     journal = {Matemati\v{c}eskie zametki},
     pages = {801--812},
     publisher = {mathdoc},
     volume = {29},
     number = {6},
     year = {1981},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1981_29_6_a0/}
}