Kuzyakov Y., Siniakina S., Ruhlmann J., Domański G., Stahr K.:         
    
        Effect of nitrogen fertilisation on below-ground carbonallocation in lettuce.  (2002 r.)   
        
        Journal Science of Food and Agriculture 
                
                
            2002, 82, 1432-1441 
                                 
    
     
            
         Domański G., Kuzyakov Y., Siniakina S., Stahr K.:         
    
        Carbon flows in the rhizosphere of ryegrass (Lolium perenne).  (2001 r.)   
        
        Journal of Plant Nutrition and Soil Science 
                
                
            2001, 164, 381-387