John C. Pascall, Sergio Rotondo, Aamir S. Mukadam, David Oxley, Judith Webster, Simon A. Walker, Jerry Piron, Christine Carter, Nicholas T. Ktistakis, Geoffrey W. Butcher
PLoS One. 2013; 8(10): e77782. Published online 2013 Oct 17. doi: 10.1371/journal.pone.0077782