1. Effects on algal growth rates by multiple nutrient limitation;Ahlgren;Arch. Hydrobiol.,1980
2. Zu Mitscherlichs Gesetz der physiologische Beziehungen;Baule;Landwirtsch. Jahrb.,1917
3. Optima and limiting factors;Blackman;Ann. Bot.,1905
4. Introduction to statistical analysis;Dixon,1969
5. The nutrient status of algal cells in batch culture;Droop,1975