@conference {arbox, title = {ArboX, a Contribution to Digital Library}, booktitle = {International Conference on Engineering and Computer Education (ICECE)}, year = {1999}, month = {August}, publisher = {IEEE Education Society}, organization = {IEEE Education Society}, address = {Rio de Janeiro, Brazil}, author = {O.W. M{\'a}rquez and F{\'e}lix Balado and M. V{\'a}zquez and D. Docampo} }