Optimized Slater-type basis sets for the elements 1-118. - Erik Van Lenthe; Evert Jan Baerends (J. Comput. Chem., 2003)

Even-tempered slater-type orbitals revisited: From hydrogen to krypton. - Delano P. Chong; Erik Van Lenthe; Stan J. A. van Gisbergen; Evert Jan Baerends (J. Comput. Chem., 2004)