Citation: Chumak, Igor; Warczok, Piotr; Richter, Klaus W. (2010). The crystal structures of Hf3+-\dNb4+-\dAs3 and Hf7.2Nb3.8As4: Members of a homologous series combining W-type, Mg-type and AlB2-type building blocks. Journal of Solid State Chemistry, 183, pp. 557-564.