Citation: Schmitt, Ruth; Blaschkowski, Bj\"orn; Eichele, Klaus; Meyer, H.-J\"urgen (2006). Calcium Tetraboride -- Does It Exist? Synthesis and Properties of a Carbon-Doped Calcium Tetraboride That Is Isotypic with the Known Rare Earth Tetraborides. Inorganic Chemistry, 45, pp. 3067-3073.