@incollection{Beschkov20, author = {Sonia Damyanova and Venko Beschkov}, title = {Biogas as a Source of Energy and Chemicals}, booktitle = {Biorefinery Concepts, Energy and Products}, publisher = {IntechOpen}, address = {Rijeka}, year = {2020}, editor = {Venko Beschkov}, chapter = {2}, doi = {10.5772/intechopen.90558}, url = {https://doi.org/10.5772/intechopen.90558} }