@article{DAN_1960_133_5_a35,
     author = {M. M. Shemyakin and Yu. A. Arbuzov and M. N. Kolosov and Yu. A. Ovchinnikov},
     title = {An enquiry into the ways of constructing a ring system of $\mathrm{BA}$ tetracyclines},
     journal = {Doklady Akademii Nauk},
     pages = {1121--1124},
     publisher = {mathdoc},
     volume = {133},
     number = {5},
     year = {1960},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1960_133_5_a35/}
}