TY - JOUR AU - A. M. Akhtyamov TI - Calculation of the coefficients of expansions in derivative chains of a spectral problem JO - Matematičeskie zametki PY - 1992 SP - 137 EP - 139 VL - 51 IS - 6 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/MZM_1992_51_6_a16/ LA - ru ID - MZM_1992_51_6_a16 ER -