Józefaciuk G., Hoffmann C., Marschner B.:  Effect of extreme acid and alkali treatment on pore properties of soil samples. (2002 r.) Journal of Plant Nutrition and Soil Science 2002, 165, 59-66 

Hoffmann C., Savric I., Józefaciuk G., Hajnos M., Sokołowska Z., Renger M., Marschner B.:  Reaction of sewage farm soils to different irrigation solutions in a column experiment. 2. Heavy metals and their leaching. (2002 r.) Journal of Plant Nutrition and Soil Science 2002, 165, 67-71 

Józefaciuk G., Hoffmann C., Renger M., Marschner B.:  Effect of extreme acid and alkali treatment on surface properties of soils. (2000 r.) Journal of Plant Nutrition and Soil Science 2000, 163, 595-601 

Hoffmann C., Renger M., Hajnos M., Sokołowska Z., Józefaciuk G., Marschner B.:  Reactions of sewage farm soils to different irrigation solutions in a column experiment.1.Solid phase physicochemical properties. (1999 r.) Journal of Plant Nutrition and Soil Science 1999, 162, 653-659