Machado CA, Haselkorn TS, Noor MA.

Genetics. 2007 Mar;175(3):1289-306. doi:10.1534/genetics.106.064758

Evaluation of the genomic extent of effects of fixed inversion differences on intraspecific variation and interspecific gene flow in Drosophila pseudoobscura and D. persimilis.

“suppression of crossovers in inversion heterozygotes also extends to loci located outside the inversion but close to it (within 1–2 Mb)”