Nasim, Ghazala, et al. “Effect of Penicillium Extractsa on Germination Vigor in Subsequent Seedling Growth of Tomato (Solanum Lycopersicum L.)”. Plant Breeding and Seed Science, vol. 65, Apr. 2012, pp. 71-78, http://ojs.ihar.edu.pl/index.php/pbss/article/view/333.