1. Documented chromosome numbers in plants;Chisaki;Madroño,1956
2. IOPB chromosome number reports XII;Datta;Taxon,1967
3. Der Anteil an Polyploiden in den Vegetationsgürteln der Westkordillere Perus;Diers;Z. Bot.,1961
4. The genus Pedilanthus (Euphorbiaceae);Dressler;Contrib. Gray Herb.,1957