Kulik M., Warda M., Król A., Oleszek M., Lipiec A., Gruszecki T., Bojar W.:         
    
        
    Total protein and macroelement content in selected psammophilous grassland species under free-range sheep grazing in Kózki Nature Reserve (2017 r.)
        
        Journal of Elementology 
                
                    2017, 
                            Vol. 22,   
                                        1,   
                
            
                                    183-193