\input zb-basic
\input zb-ioport
\iteman{io-port 03464386}
\itemau{Brusch, Richard G.; Peltier, Jean Pierre}
\itemti{Gradient generation for parametric control models.}
\itemso{Acta Astronaut. 1, 1453-1466 (1974).}
\itemcc{}
\itemut{}
\itemli{doi:10.1016/0094-5765(74)90087-3}
\end