1. Brebbia C. A. Telles J. C. F. and Wrobel L. C. (1980). Boundary element techniques . Springer‐Verlag Berlin Federal Republic of Germany.
2. Hydrodynamic Pressures on Dams During Earthquakes
3. Herrera I. (1984). “Trefftz method.” Topics in boundary element research C. A. Brebbia ed. Springer‐Verlag Berlin Federal Republic of Germany 1 225–251.