Still, W. C.; Kahn, M.; Mitra, A. (1978). "Rapid chromatographic technique for preparative separations with moderate resolution". J Org Chem. 43 (14): 2923–2925. CiteSeerX10.1.1.476.6501. doi:10.1021/jo00408a041.
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Still, W. C.; Kahn, M.; Mitra, A. (1978). "Rapid chromatographic technique for preparative separations with moderate resolution". J Org Chem. 43 (14): 2923–2925. CiteSeerX10.1.1.476.6501. doi:10.1021/jo00408a041.