Osborne KA, Robichon A, Burgess E, Butland S, Shaw RA, Coulthard A, et al. (August 1997). "Natural behavior polymorphism due to a cGMP-dependent protein kinase of Drosophila". Science. 277 (5327): 834–6. doi:10.1126/science.277.5327.834. PMID9242616.
Osborne KA, Robichon A, Burgess E, Butland S, Shaw RA, Coulthard A, et al. (August 1997). "Natural behavior polymorphism due to a cGMP-dependent protein kinase of Drosophila". Science. 277 (5327): 834–6. doi:10.1126/science.277.5327.834. PMID9242616.