S. Seefelder, A. Lutz, and E. Seigner, “Development of molecular markers for powdery mildew resistance to support breeding for high quality hops”, BrSc, vol. 59, no. 5/6, pp. 100–104, Jun. 2006, Accessed: May 30, 2026. [Online]. Available: https://brewingscience.de/index.php/brewingscience/article/view/515