BibTex format
@article{Astolfi:2002:10.1109/TRA.2002.1019475,
author = {Astolfi, A and Hsu, L and Netto, MS and Ortega, R},
doi = {10.1109/TRA.2002.1019475},
journal = {IEEE TRANSACTIONS ON ROBOTICS AND AUTOMATION},
pages = {387--392},
title = {Two solutions to the adaptive visual servoing problem},
url = {http://dx.doi.org/10.1109/TRA.2002.1019475},
volume = {18},
year = {2002}
}