1. I. Abubakar,Buried Compressional Line source in a Half-space with an Irregular Boundary, J. Phys. Earth (Tokyo)10, 1 (1962), 21.
2. J. de Noyer,The Effect of Variations in Layer Thickness on Love Waves, Bull. Seismol. Soc. Am.51, 2 (1961), 227.
3. E. H. Handelman,Surface Waves over a Slightly Curved Elastic Half-space, Progress in Applied Mechanics, Prager Anniversary Volume (Macmillan, New York 1963), 43.
4. John T. Kuo andJohn E. Nafe,Period Equation for Rayleigh Waves in a Layer overlying a Half-space with Sinusoidal Interface, Bull. Seismol. Soc. Am.52, 4 (1962), 807.
5. A. K. Mal,On the Frequency Equation for Love Waves due to Abrupt Thickening of the Crustal Layer, Geofis. Pura e Appl.52 (1962), 59.