Darwin, G.H., On variations in the vertical due to elasticity of the Earth's surface, Phil. Mag., Ser. 5, vol. 14, N. 90, 409--427, 1882.

Darwin, G.H., On variations in the vertical due to elasticity of the Earth's surface, Phil. Mag., Ser. 5, vol. 14, N. 90, 409--427, 1882.