@article{DAN_1981_260_5_a21,
     author = {K. Sh. Karaev and N. G. Furmanova and N. V. Belov},
     title = {On the crystal- and molecular structure of spiropyran, $\mathrm{C}_{18}\mathrm{H}_{15}\mathrm{NO}_4$},
     journal = {Doklady Akademii Nauk},
     pages = {1121--1124},
     publisher = {mathdoc},
     volume = {260},
     number = {5},
     year = {1981},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1981_260_5_a21/}
}