The main study volume unit is study subject (or module), which includes various forms of studies: lectures, laboratory work, training, seminars, student's individual work, projects etc. The unit of subject volume is credit. The duration and extent of studies are expressed in ECTS credit points. One credit point refers to 26,7 hours. A student admitted on to a degree programme is eligible to receive the Diploma upon successful completion of corresponding number of credits and after successful defence of final degree work. Compulsory parts of doctoral studies are studies, research and dissertation.