no. 3
texpic – Design and Implementation of a Picture Graphics Language in TeX à la pic
Cahiers GUTenberg, no. 3 (1989), pp. 9-20. 
@article{CG_1989___3_9_0,
     author = {Olejniczak-Burkert, Rolf},
     title = {texpic {\textendash} {Design} and {Implementation} of a {Picture} {Graphics} {Language} in {TeX} \`a la pic},
     journal = {Cahiers GUTenberg},
     pages = {9--20},
     publisher = {Association GUTenberg},
     number = {3},
     year = {1989},
     language = {en},
     url = {http://archive.numdam.org/item/CG_1989___3_9_0/}
}
TY  - JOUR
AU  - Olejniczak-Burkert, Rolf
TI  - texpic – Design and Implementation of a Picture Graphics Language in TeX à la pic
JO  - Cahiers GUTenberg
PY  - 1989
SP  - 9
EP  - 20
IS  - 3
PB  - Association GUTenberg
UR  - http://archive.numdam.org/item/CG_1989___3_9_0/
LA  - en
ID  - CG_1989___3_9_0
ER  - 
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%J Cahiers GUTenberg
%D 1989
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%I Association GUTenberg
%U http://archive.numdam.org/item/CG_1989___3_9_0/
%G en
%F CG_1989___3_9_0
Olejniczak-Burkert, Rolf. texpic – Design and Implementation of a Picture Graphics Language in TeX à la pic. Cahiers GUTenberg, no. 3 (1989), pp. 9-20. http://archive.numdam.org/item/CG_1989___3_9_0/