Kroh, A.; Mooi, R. (2021). World Echinoidea Database. Heliophora L. Agassiz, 1840. Accessed through: Marine Species Traits editorial board (2021) Marine Species Traits at: http://www.marinespecies.org/traits/aphia.php?p=taxdetails&id=512707 on 2024-09-09
Marine Species Traits editorial board (2024). Marine Species Traits. Heliophora L. Agassiz, 1840. Accessed at: https://www.marinespecies.org/traits./aphia.php?p=taxdetails&id=512707 on 2024-09-09