Teulings, H.L., Mullins, P.A., & Stelmach, G.E. (1986).
The elementary units of programming in handwriting.
In H.S.R. Kao, G.P. Van Galen, & R. Hoosain (Eds.), Graphonomics: Contemporary research in handwriting (pp. 21-32). Amsterdam: North-Holland.
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Teulings, H.L., Thomassen, A.J.W.M., & Van Galen, G.P. (1986).
Invariants in handwriting: The information contained in a motor program.
In H.S.R. Kao, G.P. Van Galen, & R. Hoosain (Eds.), Graphonomics: Contemporary research in handwriting (pp. 305-315). Amsterdam: North-Holland.
DOWNLOAD Teulings_etal_Invariants_Graphonomics1986.pdf