Verschoor, Martín, et al. “Variability of Stem Canker Lenght Caused by Two Phomopsis Helianthi Isolates in Sunflower Hybrids”. Semiárida, vol. 24, no. 1, Aug. 2018, https://ojs.unlpam.edu.ar/index.php/semiarida/article/view/3185.