Decarbonization of Estonian ferry lines – Challenges and opportunitiesOtsason, Riina; Thomasson, Tomi; Rahikainen, Jarkko; Tapaninen, UllaNAŠE MORE 2025 : Conference Proceedings2025 / p. 149-158 https://www.nasemore.com/wp-content/uploads/2025/09/NASE-MORE-2025_Conference-proceedings-1.pdf Methanol and ammonia as alternative fuels for icebreaking operations in the Northern Baltic SeaLeiger, Roomet; Kujala, Pentti; Carjova, Kristine; Staritsyn, Alexander; Hanninen, Samuli; Tapaninen, UllaProceedings of 4th International Conference of Maritime Science & Technology NAŠE MORE2025 / p. 117-132 https://www.nasemore.com/wp-content/uploads/2025/09/NASE-MORE-2025_Conference-proceedings-1.pdf https://doi.org/10.5281/zenodo.18389335