Silva, D. de J., Park, S.W., Hubbe, M.A. and Rojas, O.J. 2015. Amphoteric polymers to improve paper dry strength. The Journal of Engineering and Exact Sciences. 1, 2 (Dec. 2015), 65–79. DOI:https://doi.org/10.18540/jcecvl1iss2pp65-79.