BIENIASZ, M.; NECAS, T.; DZIEDZIC, E.; ONDRASEK, I.; PAWŁOWSKA, B. Evaluation of Pollen Quality and Self-Fertility in Selected Cultivars of Asian and European Pears. Notulae Botanicae Horti Agrobotanici Cluj-Napoca, v. 45, n. 2, p. 375-382, 15 Sep. 2017.