The following publications are possibly variants of this publication:
- Obstructions to partitions of chordal graphsTomás Feder, Pavol Hell, Shekoofeh Nekooei Rizi. DM, 313(19):1861-1871, 2013. [doi]
- On chordal proper circular arc graphsJørgen Bang-Jensen, Pavol Hell. DM, 128(1-3):395-398, 1994. [doi]
- Blocking Quadruple: A New Obstruction to Circular-Arc GraphsMathew C. Francis, Pavol Hell, Juraj Stacho. siamdm, 28(2):631-655, 2014. [doi]