F. Brasileiro, T. Bezerra, W. Cirne Filho, and J. Moura. " On the Design of Bouncer: A Robust and Flexible License Management Service for Avoiding Illegal Use of Software", in Anais do XI SimpĆ³sio Brasileiro de Engenharia de Software, Recife/PE, 1997, pp. 15-29, doi: https://doi.org/10.5753/sbes.1997.24038.