Bibliography
3-D Petri nets
Heiko Rölke.
3-D Petri nets.
Petri Net Newsletter, 72:3-9, April 2007.
Cover Picture Story.
BibTeX
@Article{Roelke07,
author = {R{\"o}lke, Heiko},
title = {3-{D} {Petri} nets},
journal = {{Petri Net Newsletter}},
year = 2007,
volume = 72,
pages = {3--9},
month = {April},
note = {Cover Picture Story}
}