References
Stephen Mumford
Williams, N. (2009). The ungrounded argument is unfounded: a response to Mumford. Synthese, 170 (1), 7-19. https://doi.org/10.1007/s11229-008-9344-4.
Unger, P. (2010). Reply to Stephen Mumford. Philosophy and Phenomenological Research, 80 (2), 484-490.