Stem kampen$ (all stems)
2 papers:
ICGT-2014-KonigLSW #graph transformation- Van Kampen Squares for Graph Transformation (HK, ML, CS, UW), pp. 222–236.
GT-VMT-2010-Kahl- Co-tabulations, Bicolimits and Van-Kampen Squares in Collagories (WK).
ICGT-2014-KonigLSW #graph transformation
GT-VMT-2010-Kahl