@article{MZM_1968_3_6_a12,
     author = {A.-K. Yu. Abazaliev},
     title = {Lines and surfaces of three-dimensional regression},
     journal = {Matemati\v{c}eskie zametki},
     pages = {721--730},
     publisher = {mathdoc},
     volume = {3},
     number = {6},
     year = {1968},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1968_3_6_a12/}
}