9 Jun 2004 / in a book "Cosmic Gamma-Ray Sources," eds. K.S. Cheng & G.E. Romero (Dordrecht: Kluwer), Astrophysics and Space Science Library v.304, Chapter 15, pp.361-395 (2004)
10 Feb 2004 / in a book "Cosmic Gamma-Ray Sources," eds. K.S. Cheng & G.E. Romero (Dordrecht: Kluwer), Astrophysics and Space Science Library v.304, Chapter 12, pp.279-310 (2004)