Original papers describing the method and further refinements and capabilities.
We provide a Google Scholar interface that can be used to search among the (more than 4000) papers, books, and theses citing the original Siesta article:
The SIESTA method for ab-initio order-N materials simulation J. M. Soler, E. Artacho,J. D. Gale, A. García, J. Junquera, P. Ordejón, and D. Sánchez-Portal, J. Phys.: Condens. Matt. 14, 2745-2779 (2002).
The search page will open in a new window or tab. Be sure to click on the box on the line below the paper's title to restrict the search to those papers citing it.