1. Plant inhibition by Johnson grass and its possible significance in old-field succession;Abdul-Wahab;Bull. Torrey Botan. Club,1967
2. Opal phytoliths in some Victorian soils and “red rain” residues;Baker;Australian J. Botany,1959
3. Growth inhibitors in seeds;Barton;Contrib. Boyce Thompson Inst.,1949
4. Einwirkung verschiedener Bodentypen und Boden-Extrakte auf die Keimung von Picea excelsa;Bautz;Z. Botan.,1953
5. Sur une particularité fonctionelle des exsudats racinaires de certains végétaux;Becker;Compt. Rend.,1951