Rubio, G.; Toalá, J. A.; Todt, H.; Sabin, L.; Santamaría, E.; Ramos-Larios, G.; Guerrero, M. A. (2022). "Planetary nebulae with Wolf–Rayet-type central stars – IV. NGC 1501 and its mixing layer". Monthly Notices of the Royal Astronomical Society. 517 (4): 5166–5179. arXiv:2210.09116. Bibcode:2022MNRAS.517.5166R. doi:10.1093/mnras/stac3011.
Rubio, G.; Toalá, J. A.; Todt, H.; Sabin, L.; Santamaría, E.; Ramos-Larios, G.; Guerrero, M. A. (2022). "Planetary nebulae with Wolf–Rayet-type central stars – IV. NGC 1501 and its mixing layer". Monthly Notices of the Royal Astronomical Society. 517 (4): 5166–5179. arXiv:2210.09116. Bibcode:2022MNRAS.517.5166R. doi:10.1093/mnras/stac3011.
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Sabbadin, F.; Benetti, S.; Cappellaro, E.; Turatto, M. (2000). "The tetra-lobed planetary nebula NGC 1501". Astronomy and Astrophysics. 361: 1112–1120. arXiv:astro-ph/0007039. Bibcode:2000A&A...361.1112S.
Rubio, G.; Toalá, J. A.; Todt, H.; Sabin, L.; Santamaría, E.; Ramos-Larios, G.; Guerrero, M. A. (2022). "Planetary nebulae with Wolf–Rayet-type central stars – IV. NGC 1501 and its mixing layer". Monthly Notices of the Royal Astronomical Society. 517 (4): 5166–5179. arXiv:2210.09116. Bibcode:2022MNRAS.517.5166R. doi:10.1093/mnras/stac3011.