Oracka , Teresa, and Bogusław Łapiński. “The Influence of d(r) Substitutions on Plant Dry Matter and Root Size in Hexaploid Triticale”. Plant Breeding and Seed Science, vol. 52, Dec. 2005, pp. 15-27, http://ojs.ihar.edu.pl/index.php/pbss/article/view/665.