J. KUMAR and L.R. VERMA, S.K. NAYAR, M. PRASHAR, S.C. BHARDWAJ. “Pathotype 104-3 (21R63) of Puccinia Recondita Tritici With Combined Virulence for Lr23 and Lr26”. Indian Phytopathology, vol. 51, no. 3, June 2002, pp. 290-1, https://epubs.icar.org.in/index.php/IPPJ/article/view/19684.