Villagio, Piero. Qualitative methods in elasticity / Piero Villagio. - Leyden : Noordhoff International Publishing, 1977. - 686 p. : ill. ; 23 cm. - Monographs and textbooks on mechanics of solids and fluids . ISBN: 9028600078 Subjects--Topical Terms: Elasticity.Boundary value problems.