Carvalho, D. de S., L. G. de Oliveira, E. Winter, and C. G. Mothé. “Technological Foresight Based on Citing and Cited Patents of Cellulose With Pharmaceutical Aplications”. Journal of Technology Management & Innovation, vol. 4, no. 4, Dec. 2009, pp. 32-41, doi:10.4067/S0718-27242009000400003.