TY - JOUR AU - J.J. Schäffer TI - Linear Differential Equations and Functional Analysis. VII. Equations on (? ..., + ...). JO - Mathematische Annalen PY - 1963 SP - 1 EP - 32 VL - 149 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/MAN_1963__149_161009/ ID - MAN_1963__149_161009 ER -