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Graney & Grayson 2011, p. 353. Graney, C. M.; Grayson, T. P. (2011). «On the Telescopic Disks of Stars: A Review and Analysis of Stellar Observations from the Early Seventeenth through the Middle Nineteenth Centuries». Annals of Science. 68 (3): 351–373. arXiv:1003.4918. doi:10.1080/00033790.2010.507472
Graney & Grayson 2011, pp. 352–355. Graney, C. M.; Grayson, T. P. (2011). «On the Telescopic Disks of Stars: A Review and Analysis of Stellar Observations from the Early Seventeenth through the Middle Nineteenth Centuries». Annals of Science. 68 (3): 351–373. arXiv:1003.4918. doi:10.1080/00033790.2010.507472
Graney & Grayson 2011, p. 353. Graney, C. M.; Grayson, T. P. (2011). «On the Telescopic Disks of Stars: A Review and Analysis of Stellar Observations from the Early Seventeenth through the Middle Nineteenth Centuries». Annals of Science. 68 (3): 351–373. arXiv:1003.4918. doi:10.1080/00033790.2010.507472
Graney & Grayson 2011, pp. 352–355. Graney, C. M.; Grayson, T. P. (2011). «On the Telescopic Disks of Stars: A Review and Analysis of Stellar Observations from the Early Seventeenth through the Middle Nineteenth Centuries». Annals of Science. 68 (3): 351–373. arXiv:1003.4918. doi:10.1080/00033790.2010.507472