(1)
J. Theo Kloprogge; Huada Ruan; Loc V. Duong; Ray L. Frost. FT-IR and Raman Microscopic Study at 293 K and 77 K of Celestine, SrS04, from the Middle Triassic Limestone (Muschelkalk) in Winterswijk, The Netherlands. njg 2001, 80, 41-47.