Authors: Barbosa, JG Kampf, AN Martinez, HEP Koller, OC Bohnen, H

Citation: Jg. Barbosa et al., Chrysanthemum cultivation in expanded clay. I. Effect of the nitrogen-phosphorus-potassium ratio in the nutrient solution, J PLANT NUT, 23(9), 2000, pp. 1327-1336

Authors: Panzenhagen, NV Koller, OC Sartori, IA Portelinha, NV

Citation: Nv. Panzenhagen et al., 'montenegrina' tangerine responses to liming and to organic and mineral fertilizers, PESQ AGROP, 34(4), 1999, pp. 527-533

Authors: Koller, OC Sobrinho, FF Schwarz, SF

Citation: Oc. Koller et al., Effect of ringing and spraying with gibberellic acid and mineral oil on the fruiting of young 'Monte Parnaso' navel orange trees, PESQ AGROP, 34(1), 1999, pp. 63-68