@article{DAN_1963_149_2_a31,
     author = {S. N. Ushakov and E. F. Panarin},
     title = {The synthesis of high molecular amides and hydrazides of penicillins},
     journal = {Doklady Akademii Nauk},
     pages = {334--337},
     publisher = {mathdoc},
     volume = {149},
     number = {2},
     year = {1963},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1963_149_2_a31/}
}