Pezzimenti, R. 1., Popper, K. R. 1., Tonini, V. 1., Balthasar, H. U. v. 1., Eccles, J. C. 1., & Pavan, P. 1. (1992). Homo metaphysicus, with letters from K. R. Popper, V. Tonini, L. Pauling, J. Eccles, H. von Balthasar, P. Pavan. Napoli [etc.]: LER.

Pezzimenti, Rocco 1950-, Karl R. 1902-1994 Popper, Valerio 1901-1992 Tonini, Hans Urs von 1905-1988 Balthasar, John C. 1903-1997 Eccles, and Pietro 1903-1994 Pavan. Homo Metaphysicus, With Letters From K. R. Popper, V. Tonini, L. Pauling, J. Eccles, H. Von Balthasar, P. Pavan. Napoli [etc.]: LER, 1992.

Pezzimenti, Rocco 1950-, et al. Homo Metaphysicus, With Letters From K. R. Popper, V. Tonini, L. Pauling, J. Eccles, H. Von Balthasar, P. Pavan. Napoli [etc.]: LER, 1992.