@misc{jackson_joyce_heitmann_2001, title={Method for making dissolving pulp from paper products containing hardwood fibers}, volume={6,254,722}, number={2001 July 3}, publisher={Washington, DC: U.S. Patent and Trademark Office}, author={Jackson, L. S. and Joyce, T. W. and Heitmann, J. A., Jr.}, year={2001} }
 @article{jackson_heitmann_joyce_1998, title={Production of dissolving pulp from recovered paper using enzymes}, volume={81}, number={3}, journal={TAPPI Journal}, author={Jackson, L. S. and Heitmann, J. A. and Joyce, T. W.}, year={1998}, pages={171–178} }