@PhdThesis{Bet-Phd,
 author = {L.~Bettini},
 title = {{Linguistic Constructs for Object-Oriented Mobile Code Programming \& their Implementations}},
 school = {Dip.\ di Matematica, Universit\`a di Siena},
 year = 2003,
 note = {Available at \texttt{http://music.dsi.unifi.it}}
}