1. Oman J, Tuma M, Senegačnik A, Kuštrin I, Sekavčnik M. The performance tests of steam boiler on unit 4, power plant Šoštanj (Slovenian). Faculty of Mechanical Engineering, Ljubljana, Report No. 03-26/2W-95/JO., 1995
2. Oman J, Tuma M, Senegačnik A, Kuštrin I, Sekavčnik M. The tests of steam boiler on unit 4, power plant Šoštanj (Slovenian). Faculty of Mechanical Engineering, Ljubljana, Report No. 03-29/1-96/JO., 1996
3. Oman J, Tuma M, Senegačnik A, Kuštrin I, Sekavčnik M. Parameters of unit 4 in power plant Šoštanj (Slovenian). Faculty of Mechanical Engineering, Ljubljana, Report No. 03-3/1-98/JO, 1998
4. Oman J, Tuma M, Senegačnik A, Kuštrin I. Parameters of unit 5 in power plant Šoštanj (Slovenian). Faculty of Mechanical Engineering, Ljubljana, Report No. 03-13/1-98/JO, 1998
5. Šušteršič A. Power Plant Šoštanj, Analyses of coals for the period 1980 to 1995 (Slovenian). Elektroinštitut Milan Vidmar, Ljubljana, Report No. EKO/Š-96/14, 1996