1. Production of lipase by Pseudomonas fragi in a synthetic medium;Alford;J. Bacteriol.,1963
2. Physiological and biochemical studies of certain enzymes produced from local yeasts;Desoukey,1976
3. Physiological and biochemical studies of certain enzymes produced from Penicillium lanosum;El-Sheikeh,1976
4. Effect of Streptomyces spp. on the development of Azotobacter and its nitrogen fixation in culture and soil;El-Wan,1969