Object Oberon
{Oberon} plus {class}es and {method}s by H. Moessenboeck &
J. Templ, 1989. See {Oberon-2}.
["Object Oberon - An Object-Oriented Extension of Oberon", H.
Moessenboeck et al, ETH TR 109 (Apr 1990)].
["Object Oberon - A Modest Object-Oriented Language",
H. Moessenboeck & J. Templ, in Structured Programming 10(4),
1989].