### 6 papers:

- ICGT-2010-Kahl #category theory #graph transformation
- Amalgamating Pushout and Pullback Graph Transformation in Collagories (WK), pp. 362–378.
- ICGT-2008-BauderonCL
- Pullback Grammars Are Context-Free (MB, RC, OL), pp. 366–378.
- ICALP-2003-Doberkat #bisimulation #category theory #probability
- Semi-pullbacks and Bisimulations in Categories of Stochastic Relations (EED), pp. 996–1007.
- FoSSaCS-1998-Klempien-Hinrichs #refinement
- Net Refinement by Pullback Rewriting (RKH), pp. 189–202.
- TAGT-1998-EhrigHLOPR #framework #graph #rule-based
- Double-Pullback Graph Transitions: A Rule-Based Framework with Incomplete Information (HE, RH, ML, FO, JP, GR), pp. 85–102.
- TAGT-1998-JacquetK #approach
- Node Replacement in Hypergraphs: Translating NCE Rewriting into the Pullback Approach (HJ, RKH), pp. 117–130.