@article{DAN_1967_177_3_a18,
     author = {V. M. Marchenko and A. M. Prokhorov},
     title = {Spectrum-time investigations into the oscillation of $\mathrm{CaF}_2:\mathrm{Sm}^{2+}$ crystal upon excitation by a ruby laser},
     journal = {Doklady Akademii Nauk},
     pages = {557--559},
     publisher = {mathdoc},
     volume = {177},
     number = {3},
     year = {1967},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1967_177_3_a18/}
}