Anaerobic co-digestion of sewage sludge with fish farming wasteKuusik, Argo; Pachel, Karin; Kuusik, Aare; Loigu, EnnThe 9th International Conference "Environmental Engineering" : 22-23 May 2014, Vilnius, Lithuania : selected papers2014 / [8] p. : ill Low-frequency non-reciprocal sound propagation features in thermoacoustic waveguideAuriemma, FabioThe Journal of the Acoustical Society of America2024 / p. 314-325 https://doi.org/10.1121/10.0026453