and P.D. TYAGI, AMAR SINGH, D.K. BANYAL*. “Host Range and Perpetuation of Erysiphe Pisi, the Causal Agent of Powdery Mildew of Pea”. Indian Phytopathology, vol. 65, no. 1, Mar. 2012, pp. 102-4, https://epubs.icar.org.in/index.php/IPPJ/article/view/16104.