2020
HYPOSO: Small hydropower technologies - European state-of-the-art innovations, WIP Renewable Energies, Munich, Germany, 2020
2018
Steller J, Lewandowski S., Malicka E., Kremere E., Popa B., Punys P.: Hydropower in the East European region - challenges and opportunities. HYDRO 2018 "Progress through partnerships", Gdańsk, 15-17 października 2018, materiały konferencyjne (pendrive), referat 02b01, 22 s.
2013
Steller J.: Hydropower and its development, Acta Energetica, 3/14 (2013), pp. 7-20 bilingual article - English and Polish