Wright E. P. & Studer T. (1889). Report on the Alcyonaria collected by H. M.S. Challenger during the years 1873-76. <em>Report on the Scientific Results of the Voyage of H.M.S. Challenger during the years 1873–76. Zoology.</em> 31 (part 64), lxxii+ 314 pp., 43 pls. London., available online athttp://www.19thcenturyscience.org/HMSC/HMSC-Reports/Zool-64/htm/doc.html[details]
Cordeiro, R.; van Ofwegen, L.; Williams, G. (2018). World List of Octocorallia. Primnoisis (Delicatisis) rigida Wright & Studer, 1889. Accessed through: De Broyer, C.; Clarke, A.; Koubbi, P.; Pakhomov, E.; Scott, F.; Vanden Berghe, E. and Danis, B. (Eds.) (2018) Register of Antarctic Marine Species at: http://www.marinespecies.org/rAMS/aphia.php?p=taxdetails&id=869813 on 2019-02-19
De Broyer, C.; Clarke, A.; Koubbi, P.; Pakhomov, E.; Scott, F.; Vanden Berghe, E. and Danis, B. (Eds.) (2019). Register of Antarctic Marine Species. Primnoisis (Delicatisis) rigida Wright & Studer, 1889. Accessed at: http://www.marinespecies.org/RAMS/aphia.php?p=taxdetails&id=869813 on 2019-02-19
original descriptionWright E. P. & Studer T. (1889). Report on the Alcyonaria collected by H. M.S. Challenger during the years 1873-76. <em>Report on the Scientific Results of the Voyage of H.M.S. Challenger during the years 1873–76. Zoology.</em> 31 (part 64), lxxii+ 314 pp., 43 pls. London., available online athttp://www.19thcenturyscience.org/HMSC/HMSC-Reports/Zool-64/htm/doc.html[details]