1. Rozporządzenie Ministra Środowiska z dnia 9 grudnia 2014 r. w sprawie katalogu odpadów. Dziennik Ustaw Rzeczypospolitej Polskiej 2014 poz. 1923 (2014)
2. Ostrowski P., Pronobis M., Kalisz S.., Gramatyka F., Wejkowski R.: Patent PL212497 Method and installation of biomass pyrolysis prior to cofiring, in particular in power boilers (2008)
3. Ostrowski P., Pronobis M., Kalisz S., Gramatyka F., Wejkowski R., Patent PL212557 Method and installation of carbonisation and biomass gasification prior to cofiring, in particular in power boilers (2008)
4. Ostrowski P., Pronobis M., Kalisz S., Gramatyka F., Wejkowski R.: Patent PL214645 Method and installation of biomass gasification prior to cofiring, in particular in power boilers (2008)
5. Ostrowski P., Pronobis M., Kalisz S., Wejkowski R., Remiorz L.: Patent application P393836 Method of measuring and gas stream meter in short closed ducts of large cross-section area, in particular in air and flue gases boiler and ventilation circuits, (2013)