Barłóg, Przemysław, and Witold Grzebisz. “Sugar Beets Fertilization With Potassium, Sodium and Magnesium — Yielding and Diagnostic Evaluation: Part I. Yield of Roots and Leaves”. Bulletin of Plant Breeding and Acclimatization Institute, no. 234, Dec. 2004, pp. 73-82, doi:10.37317/biul-2004-0010.