Dunninger, D. R. A Picone integral identity for a class of fourth order elliptic differential inequalities. (English) Zbl 0249.35023 Atti Accad. Naz. Lincei, VIII. Ser., Rend., Cl. Sci. Fis. Mat. Nat. 50, 630-641 (1971). Page: −5 −4 −3 −2 −1 ±0 +1 +2 +3 +4 +5 Show Scanned Page Cited in 4 Documents MSC: 35J30 Higher-order elliptic equations 35J40 Boundary value problems for higher-order elliptic equations 35P15 Estimates of eigenvalues in context of PDEs PDF BibTeX XML Cite \textit{D. R. Dunninger}, Atti Accad. Naz. Lincei, VIII. Ser., Rend., Cl. Sci. Fis. Mat. Nat. 50, 630--641 (1971; Zbl 0249.35023) OpenURL