GAJEWSKI, M., Z. WĘGLARZ, A. SEREDA, M. BAJER, A. KUCZKOWSKA, and M. MAJEWSKI. “Carotenoid Accumulation by Carrot Storage Roots in Relation to Nitrogen Fertilization Level”. Notulae Botanicae Horti Agrobotanici Cluj-Napoca, Vol. 38, no. 1, June 2010, pp. 71-75, doi:10.15835/nbha3813535.