@article{VMUMM_1985_2_a8,
     author = {N. N. Yakovlev},
     title = {On a narrow lattice $3$-packing and friable lattice $3$-covering in the plane},
     journal = {Vestnik Moskovskogo universiteta. Matematika, mehanika},
     pages = {33--37},
     publisher = {mathdoc},
     number = {2},
     year = {1985},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VMUMM_1985_2_a8/}
}