Read in Bulgarian: http://agroinfo.dabu-edu.org/index.php/bg/novini/332-v-balgariya-shte-se-otglezhda-cheren-tryufel-v-plantatzii
Read in Romanian: http://agroinfo.dabu-edu.org/index.php/ro/stiri/333-bulgaria-va-ave-plantatii-de-trufe-negre