Barkoudah, Y.I. 1962: A revision of Gypsophila, Bolanthus, Ankyropetalum and Phryna. Wentia 9: 1–203.
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| Barkoudah, Y.I. 1962: A revision of Gypsophila, Bolanthus, Ankyropetalum and Phryna. Wentia 9: 1–203. |