@article{DAN_1957_114_1_a33,
     author = {V. I. Kasatochkin and N. K. Larina},
     title = {An investigation of thehumic acid structure in fossil coals},
     journal = {Doklady Akademii Nauk},
     pages = {139--142},
     publisher = {mathdoc},
     volume = {114},
     number = {1},
     year = {1957},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1957_114_1_a33/}
}