<The idea of a fertility ritual using the shafts in the Great Pyramid was discussed by me in an article published in 1990.
See: Robert Bauval 'The Seeding of the Star-Gods: A Fertility Rite in Cheops's Pyramid?' in Discussions in Egyptology No.16, 1990.
You can read the article also in Appendix 1 of my book SECRET CHAMBER.
Ahh i must have missed that one in 1990, i shall have to go and look that one up.