Discrete mathematics.

1. T. E. Piliposyan, “O planarno realizuemykh gipergrafakh”, DAN ArmSSR, 82:3 (1986), 102–106    
2. T. E. Piliposyan, “Otsenki chisla realizatsii gipergrafa”, Matemamicheskie voprosy kibernernetiki i vychislitelnoi tekhniki, 14 (1985), 26–33    
3. S. L. Ambaryan, A. A. Movsesyan, T. E. Piliposyan, “O minimalnykh realizatsiyakh gipergrafov”, Voprosy radioelektroniki Ser. EVT, 1981, № 16, 37–42

• Russian-Armenian University, Yerevan