S. B. Ilić, S. S. Konstantinović, G. D. Gojgić-Cvijović, and V. B. Veljković, “Antibiotic production by Streptomyces hygroscopicus CH-7 in medium containing Schiff base complexes”, Hem Ind, vol. 73, no. 2, pp. 93–101, Apr. 2019.