Bamber, R.N.; El Nagar, A. & Arango, C. P. (Eds) (2018). Pycnobase: World Pycnogonida Database. Nymphon pfefferi Loman, 1923. Accessed through: Costello, M.J.; Bouchet, P.; Boxshall, G.; Arvanitidis, C.; Appeltans, W. (2018) European Register of Marine Species at: http://www.marbef.org/data/aphia.php?p=taxdetails&id=173487 on 2021-01-24
Costello, M.J.; Bouchet, P.; Boxshall, G.; Arvanitidis, C.; Appeltans, W. (2021). European Register of Marine Species. Nymphon pfefferi Loman, 1923. Accessed at: http://www.marbef.org/data/aphia.php?p=taxdetails&id=173487 on 2021-01-24
basis of recordClarke, A.; Johnston, N.M. (2003). Antarctic marine benthic diversity. <i>Oceanography and Marine Biology: an Annual Review</i>. 41: 47-114. (look up in RoR) [details]
additional sourceMunilla, T.; Soler Membrives, A. (2008). Check-list of the pycnogonids from Antarctic and sub-Antarctic waters: zoogeographic implications. <em>Antarctic Science.</em> 21(02): 99. (look up in RoR), available online athttps://doi.org/10.1017/s095410200800151x[details] Available for editors