Xue, Zhao, Liqin Qu, and Xiusheng Yang. 2014. “Potential Production and Spatial Distribution of Hybrid Poplar As a Biofuel Crop in Connecticut, USA”. International Journal of Agricultural and Biological Engineering 7 (2):10-18. https://ijabe.migration.pkpps06.publicknowledgeproject.org/index.php/ijabe/article/view/1223.