Raytchev T., Rousseva S., Mehandjiev D., Hajnos M., Sokołowska Z.:  Influence of humus substances on hydrophilicity and energy state of soil adsorbent. (2005 r.) Institute of Agrophyscis PAS, Lublin, "Physicochemical character of soil adsorbent" 2005, 133-147 

Raytchev T., Rousseva S., Mehandjiev D., Józefaciuk G., Sokołowska Z.:  Structural-adsorption state of the soil adsorbent at macro-aggregative level of the soil organization. (2005 r.) Institute of Agrophyscis PAS, Lublin, "Physicochemical character of soil adsorbent" 2005, Physicochemical character of soil adsorbent, 7-20 

Raytchev T., Mehandjiev D., Rousseva S., Józefaciuk G., Hajnos M.:  Structural-adsorption state of the soil clay fraction. (2005 r.) Institute of Agrophyscis PAS, Lublin, "Physicochemical character of soil adsorbent" 2005, 21-41 

Mehandjiev D., Raytchev T., Sokołowska Z., Hajnos M.:  On the anomalus shape of low-temperature nitrogen adsorption isotherms of <2 m clay fractions isolated from soils. (2005 r.) Institute of Agrophyscis PAS, Lublin, "Physicochemical character of soil adsorbent" 2005, 42-51 

Raytchev T., Rousseva S., Mehandjiev D., Hajnos M., Józefaciuk G.:  Porosity of the soil adsorbent. (2005 r.) Institute of Agrophyscis PAS, Lublin, "Physicochemical character of soil adsorbent" 2005, 52-59