@article{DAN_1968_180_4_a5,
     author = {Li Hoang Tu},
     title = {An approximate minimax property of the $R^2$ test},
     journal = {Doklady Akademii Nauk},
     pages = {793--794},
     publisher = {mathdoc},
     volume = {180},
     number = {4},
     year = {1968},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1968_180_4_a5/}
}