Martínez, Vicent J.; Jones, Bernard J. T.: ["Why the universe is not a fractal" http://adsabs.harvard.edu/abs/1990MNRAS.242..517M] , Monthly Notices of Royal Astronomical Society(ISSN 0035-8711), vol. 242, Feb. 1990, p. 517-521
nyu.edu
archive.nyu.edu
Jones, A. (2020). The ancient Ptolemy. ln Ptolemy's Science of the Stars in the Middle Ages (D. Juste, B. van Dalen, D. N. Hasse, C. Burnett, Turnhout, Brepols, Eds.) Ptolemaeus Arabus et Latinus Studies 1, 13-34.[1]