TY - JOUR AU - M. S. Agranovich TI - On modules of eigenvalues for non-self-adjoint agmon--Douglis--Nirenberg elliptic boundary problems with a parameter JO - Funkcionalʹnyj analiz i ego priloženiâ PY - 1992 SP - 51 EP - 55 VL - 26 IS - 2 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/FAA_1992_26_2_a6/ LA - ru ID - FAA_1992_26_2_a6 ER -