Gómez-Gordillo, Sebastian и др. Distance mapping applied to four well-known planetary nebulae and a nova shell // Monthly Notices of the Royal Astronomical Society 492. 2020. DOI:10.1093/mnras/staa060. с. 4097–4111.
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Minkowski, R. и др. The Peculiar Nebula NGC 6302 // Astrophysical Journal 148. 1967. с. 659-662. Посетен на 17 февруари 2020.