Cabbolet, M. J. T. F. (2010). "Elementary Process Theory: a formal axiomatic system with a potential application as a foundational framework for physics supporting gravitational repulsion of matter and antimatter". Annalen der Physik. 522 (10): 699–738. Bibcode:2010AnP...522..699C. doi:10.1002/andp.201000063. S2CID123136646.
Santilli, R. M. (1999). "A classical isodual theory of antimatter and its prediction of antigravity". International Journal of Modern Physics A. 14 (14): 2205–2238. Bibcode:1999IJMPA..14.2205S. doi:10.1142/S0217751X99001111.
Cabbolet, M. J. T. F. (2010). "Elementary Process Theory: a formal axiomatic system with a potential application as a foundational framework for physics supporting gravitational repulsion of matter and antimatter". Annalen der Physik. 522 (10): 699–738. Bibcode:2010AnP...522..699C. doi:10.1002/andp.201000063. S2CID123136646.
Santilli, R. M. (1999). "A classical isodual theory of antimatter and its prediction of antigravity". International Journal of Modern Physics A. 14 (14): 2205–2238. Bibcode:1999IJMPA..14.2205S. doi:10.1142/S0217751X99001111.
Cabbolet, M. J. T. F. (2010). "Elementary Process Theory: a formal axiomatic system with a potential application as a foundational framework for physics supporting gravitational repulsion of matter and antimatter". Annalen der Physik. 522 (10): 699–738. Bibcode:2010AnP...522..699C. doi:10.1002/andp.201000063. S2CID123136646.