@article{DAN_1961_141_4_a28,
     author = {G. P. Popov and G. I. Chufarov},
     title = {Activities, heats and entropies of mixing in $\mathrm{NiFe}_2\mathrm{O}_4$ {\textendash} $\mathrm{Fe}_3\mathrm{O}_4$ solid solutions},
     journal = {Doklady Akademii Nauk},
     pages = {877--879},
     year = {1961},
     volume = {141},
     number = {4},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1961_141_4_a28/}
}