@article{DAN_1980_250_5_a25,
     author = {K. K. Palkina and S. I. Maksimova},
     title = {Structure of crystals of double, mixed ortho-pyrophosphate of potassium and nickel,
},
     journal = {Doklady Akademii Nauk},
     pages = {1130--1134},
     publisher = {mathdoc},
     volume = {250},
     number = {5},
     year = {1980},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1980_250_5_a25/}
}