VEĽAS, Rastislav et al. Determination of gross calorific value and net calorific value of fine forest fuel sampled in selected forest stands. In Delta : fire protection & safety scientific journal. ISSN 1337-0863, 2020, vol. 14, iss. 2, p. 5-13. ITMS 313011T720 ; ITMS2014+: 313012Q879 ; APVV-17-0005 ; VEGA 1/0493/18. Dostupné na internete: <https://kpo.tuzvo.sk/sites/default/files/1_velas_0.pdf>