@article{DAN_1960_131_1_a23,
     author = {G. Ya. Kondrat'eva and Huang Chi-khen},
     title = {Reaction of pyridine-3,4-dicarboxylic acids with hydrazine and aniline},
     journal = {Doklady Akademii Nauk},
     pages = {94--97},
     publisher = {mathdoc},
     volume = {131},
     number = {1},
     year = {1960},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1960_131_1_a23/}
}