Kallenbach, R., Czechowski, A., Hilchenbach, M., & Wurz, P. (2007). Turbulence and ion acceleration in the outer heliosphere. In V. Izmodenov, & R. Kallenbach (Eds.), The Physics of the Heliospheric Boundaries (pp. 203-243). Noordwijk, Netherlands: ESA Publ. Div.