Ahmadi Aghdam, K., Motallebi-azar, A. R., Zaare Nahandi, F., & Gohari, G. "Interaction effect of indole butyric acid and putrecin on in vitro root regeneration of pyrodwarf root stock (Pyrus communis L.) ", Iranian Journal of Horticultural Science, 52, 3, 2021, 721–730. doi: 10.22059/ijhs.2020.287276.1698