Jolliet, S., McMillan, B. F., Vernay, T., Villard, L., Hatzky, R., Bottino, A., et al. (2009). Influence of the parallel nonlinearity on zonal flows and heat transport in global gyrokinetic particle-in-cell simulations. Physics of Plasmas, 16: 072309 (11pp). doi:10.1063/1.3174433.