The following publications are possibly variants of this publication:
- A Zero-Free Interval for Chromatic Polynomials of GraphsBill Jackson. cpc, 2:325-336, 1993.
- A maximal zero-free interval for chromatic polynomials of bipartite planar graphsFeng Ming Dong, Khee Meng Koh. DM, 308(11):2285-2287, 2008. [doi]
- On Zero-Free Intervals in (1, 2) of Chromatic Polynomials of Some Families of GraphsFeng Ming Dong, Khee Meng Koh. siamdm, 24(2):370-378, 2010. [doi]
- Zero-free intervals of chromatic polynomials of hypergraphsRuixue Zhang, Fengming Dong. DM, 343(12):112134, 2020. [doi]
- A zero-free interval for flow polynomials of cubic graphsBill Jackson. JCT, 97(1):127-143, 2007. [doi]