@inproceedings{buehlmann_thomas_zuo_2011, title={Cost minimization through optimized raw material quality composition}, volume={27}, number={4}, booktitle={Robotics and Computer-Integrated Manufacturing}, author={Buehlmann, U. and Thomas, R. E. and Zuo, X. Q.}, year={2011}, pages={746–754} }
 @misc{buehlmann_zuo_thomas_2010, title={Second-order polynomial model to solve the least-cost lumber grade mix problem}, volume={60}, number={1}, journal={Forest Products Journal}, author={Buehlmann, U. and Zuo, X. Q. and Thomas, R. E.}, year={2010}, pages={69–77} }
 @article{buehlmann_zuo_thomas_2004, title={Linear programming and optimizing lumber quality composition in secondary hardwood dimension mills}, volume={218}, ISSN={["0954-4054"]}, DOI={10.1243/095440504772830291}, abstractNote={ Linear programming has been widely applied in the secondary hardwood dimension manufacturing industries to solve the least-cost lumber grade mix problem, which refers to the search for minimal raw material costs. Most existing models are based on the assumption of a simple linear relationship between lumber grade mix and yield. However, this crucial assumption has never been verified. }, number={1}, journal={PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART B-JOURNAL OF ENGINEERING MANUFACTURE}, author={Buehlmann, U and Zuo, X and Thomas, RE}, year={2004}, month={Jan}, pages={143–147} }