Alekseev A., Alekseeva T., Renkou X., Hajnos M., Kalinin P.:  Effecte of soil acidification induced by the tea plantation on mineralogical and chemical properties of yellow brown earth (China)r (2010 r.) International Conference "Clays, Clay Minerals and Layered Materials - CMLM 2009", Zvenigorod, Moscow Region, Russia, 21-25.09.2010 r. 2010,