Lewis-Williams, J.D., Dowson, T.A., Bahn, P.G., Bandi, H.G., Bednarik, R.G., Clegg,
J., Consens, M., Davis, W., Delluc, B., Delluc, G. and Faulstich, P., 1988. The signs
of all times: entoptic phenomena in Upper Palaeolithic art [and comments and reply].
Current anthropology, 29(2), pp.201-245.
[www.researchgate.net]

"This paper approaches the signs by constructing a neuropsychological model of
the apprehension of entoptic phenomena in three stages of altered states of
consciousness."

Yours,

Paul H.

"The past is never dead. It's not even past."
William Faulkner, Act 1, Scene III, Requiem for a Nun (1951)