References

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PROGRAPH Reference, Second Edition, The Gunakara Sun Systems, Sept. 1989, 1990

 [2]

PROGRAPH Tutorial, Seventh Edition, Pictorius Inc., Sept. 1996

 [3]

PROGRAPH ABC Reference, Seventh Edition, Pictorius Inc., Sept. 1996

 [4]

PROGRAPH Reference, Second Edition, The Gunakara Sun Systems, 1989, 1990

 [5]

S. Pruß, A. Wolff, Vergleich visueller Programmierung mit herkömmlicher Programmierung, Studienarbeit Mai 1994, Medizinische Informatik, Uni-Heidelberg

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Leslie Lamport, LaTeX: A Document Preparation System, Second Edition, Addison-Wesley, 1994.