Ślesak, Halina, Liszniańska, Magdalena, Popielarska-Konieczna, Marzena, AND Ślesak, Ireneusz. " Hybrid sorrel (Rumex tianschanicus × Rumex patientia) a high biomass yielding plant as an interesting object of physiological research" Modern Phytomorphology [Online], Volume 6(1 April 2014)