    bf(bison)(1), bf(bison++)(1), 
    SYMBOLVALUE(manalso),
    bf(bison.info) (using texinfo),
    bf(flexc++)(1),
    bf(https://fbb-git.gitlab.io/bisoncpp/)

    Lakos, J. (2001) bf(Large Scale C++ Software Design), Addison Wesley.nl()
    Aho, A.V., Sethi, R., Ullman, J.D. (1986) bf(Compilers), Addison Wesley.
