@article{DAN_1969_187_6_a11,
     author = {\`E. I. Grigolyuk and L. A. Fil'shtinskii},
     title = {Equivalent rigidity of biperiodic lattice strengthened by elastic rings},
     journal = {Doklady Akademii Nauk},
     pages = {1254--1256},
     publisher = {mathdoc},
     volume = {187},
     number = {6},
     year = {1969},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1969_187_6_a11/}
}