Roberts, H., Kelley, S., & Dahl, P. (2001). Obtaining Geologically Meaningful (40)Ar–(39)Ar Ages from Altered Biotite. Chemical Geology. https://doi.org/10.1016/S0009-2541(00)00255-2
Roberts, H, S Kelley, and Peter Dahl. 2001. “Obtaining Geologically Meaningful (40)Ar–(39)Ar Ages from Altered Biotite”. Chemical Geology. https://doi.org/10.1016/S0009-2541(00)00255-2.
Roberts, H., S. Kelley, and P. Dahl. Obtaining Geologically Meaningful (40)Ar–(39)Ar Ages from Altered Biotite. Chemical Geology, 15 Feb. 2001, doi:10.1016/S0009-2541(00)00255-2.