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