OGRAJŠEK, S. et al. 2016. The impact of the period of sowing and fertilization on morphological characteristics and seed yield of garden poppy (Papaver somniferum L.). Acta agriculturae Slovenica. 107, 1 (Apr. 2016), 219–228. DOI:https://doi.org/10.14720/aas.2016.107.1.20.