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This research was partially supported by the National Science Foundation.
After this paper was accepted for publication it was discovered that the results proved here have already been published in another article, viz. F. Beukenhout, ‘Une généralisation du théorème de von Staudt-Hua’. Bull. cl. Sc. Acad. Roy. Belg. 51 (1965), 446–457.
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James, D.G. Projective homomorphisms and von Staudt's theorem. Geom Dedicata 13, 291–294 (1982). https://doi.org/10.1007/BF00148234
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DOI: https://doi.org/10.1007/BF00148234