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Feller, Urs; Riesen, T.; Zehnder, H.-J. (2000). Transfer of Cesium from the Xylem to the Phloem in the Stem of Wheat. Biologia Plantarum, 43(2), pp. 309-311. Czechoslovak Academy of Sciences 10.1023/A:1002737201577
Lippuner, K.; Zehnder, H.-J.; Casez, J. P.; Takkinen, R.; Descoeudres, C.; Jaeger, Ph. (1996). Effect of calcium-channel blockers on calcium-phosphate metabolism in patients with end-stage renal disease. Nephrology, dialysis, transplantation, 11(1), pp. 70-74. Oxford: Oxford University Press 10.1093/ndt/11.1.70
