@article{DAN_1958_121_3_a17,
     author = {N. K. Kochetkov and E. E. Nifantyev},
     title = {Substitution reactions in the methylene group of $\beta$-ketoacetals},
     journal = {Doklady Akademii Nauk},
     pages = {462--465},
     publisher = {mathdoc},
     volume = {121},
     number = {3},
     year = {1958},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1958_121_3_a17/}
}