TY - JOUR AU - I. A. Sheipak TI - Nontrivial fractals in the plane and linear operators with joint spectral radius equal to 1 JO - Matematičeskie zametki PY - 1998 SP - 797 EP - 800 VL - 63 IS - 5 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/MZM_1998_63_5_a20/ LA - ru ID - MZM_1998_63_5_a20 ER -