, 2011, Towards a neuroscience of spirituality, in H. Walach, S. Schmidt & W. B. Jonas (eds.), Neuroscience, consciousness and spirituality, Dordrecht, Springer, pp. 253-262.
with Walach, H. , Schmidt, S. (eds) , 2011a, Neuroscience, consciousness and spirituality, Springer, Dordrecht.