TY - JOUR AU - V. L. Makarov AU - S. V. Makarov AU - M. N. Moskal'kov TI - Spectral properties of the Laplace difference operator on a hexagonal grid, and some of their applications JO - Differencialʹnye uravneniâ PY - 1993 SP - 1216 EP - 1221 VL - 29 IS - 7 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/DE_1993_29_7_a13/ LA - ru ID - DE_1993_29_7_a13 ER -