1. The nitrate reductase and nitrite reductase activities in cucumber seedlings as affected on divalent cations;Buczek;Acta Physiol. Plant.,1980
2. Nitrate reductase and proteotic enzymes activity in 4-week-old wheat as influenced by nitrate or ammonium and Ca:Mg ratio;Buczek;Acta Physiol. Plant.,1980
3. Cieæko, Z., Wyszkowski, M., Gronowicz, Z. and Pilarek, B. (1994) Wpzyw nawogenia na cechy ugytkowe ziemniaków. Mat Konf. Nauk. Inst. Ziem. Bonin, 26–51.
4. Decree of Minister of Health and Social Welfare on admissible residues in food stuffs of chemicals used at plant, protection, storage and transport of plants. Dziennik Ustaw 1993, 104.
5. Dziekanowski, A., Cieæko, Z. and Nowak, G. (1992) Zawartoœæ podstawowych makro- i mikroskzadników w bulwach ziemniaka w zalegnoœci od poziomu nawogenia potasem., Acta Acad. Agricult. Techn. Olst. Agricultura, 54, 117–126.