TY - JOUR AU - N. K. Kochetkov AU - E. E. Nifantyev TI - Substitution reactions in the methylene group of $\beta$-ketoacetals JO - Doklady Akademii Nauk PY - 1958 SP - 462 EP - 465 VL - 121 IS - 3 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/DAN_1958_121_3_a17/ LA - ru ID - DAN_1958_121_3_a17 ER -