no. 2
Glued convexity spaces, frames and graphs
Compositio Mathematica, Tome 47 (1982) no. 2, pp. 217-222. 
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     year = {1982},
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     url = {http://archive.numdam.org/item/CM_1982__47_2_217_0/}
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Degreef, Eric. Glued convexity spaces, frames and graphs. Compositio Mathematica, Tome 47 (1982) no. 2, pp. 217-222. http://archive.numdam.org/item/CM_1982__47_2_217_0/

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