Haddrill, Penelope R, Brian Charlesworth, Daniel L Halligan, and Peter Andolfatto. 2005. “Patterns of Intron Sequence Evolution in Drosophila Are Dependent Upon Length and GC Content.”. Genome Biol 6 (8): R67. Reference Link
Halligan, Daniel L, Adam Eyre-Walker, Peter Andolfatto, and Peter D Keightley. (2004) 2004. “Patterns of Evolutionary Constraints in Intronic and Intergenic DNA of Drosophila.”. Genome Res 14 (2): 273-9. Reference Link