L. N. G. Filon, On an Approximate Solution for the Bending of a Beam of Rectangular Cross-Section under any System of Load, with Special Reference to Points of Concentrated or Discontinuous Loading, ...

Published: 20 April 1935 Rayleigh's Principle and its Applications to Engineering: the Theory and Practice of the Energy Method for the Approximate Determination of Critical Loads and Speeds A. F.

Neil Berger, Derivation of Approximate Long Wave Equations in a Nearly Uniform Channel of Approximately Rectangular Cross Section, SIAM Journal on Applied Mathematics, Vol. 31, No. 3 (Nov., 1976), pp.