TY - JOUR AU - Allegretto, Walter AU - Siegel, David TI - Picone's identity and the moving plane procedure JO - Electronic Journal of Differential Equations PY - 1995 VL - 1995 IS - 14 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/EJDE_1995__1995_14_a0/ LA - en ID - EJDE_1995__1995_14_a0 ER -