\input zb-basic
\input zb-ioport
\iteman{io-port 04088955}
\itemau{Ehlers, E.M.; von Solms, S.H.}
\itemti{Using random context structure grammars to represent chemical structures.}
\itemso{Inf. Process. Lett. 30, No.3, 159-166 (1989).}
\itemcc{}
\itemut{three-dimensional representations of molecules; three-dimensional finite automata; random context structure grammars}
\itemli{doi:10.1016/0020-0190(89)90135-X}
\end