Hugh O'Neill Michael Petrides Margaret Robinson 布莱恩·施密特 Chris D. ThomasHywel Rhys Thomas Mathukumalli Vidyasagar Krishnaswamy VijayRaghavan Tejinder Virdee
2011-03-08 [2016-04-12], ISBN 978-0-86243-970-5 Jenkins, Robert Thomas, MORGAN ap HYWEL, Dictionary of Welsh Biography (Honourable Society of Cymmrodorion)
Jeremy R.; Albert Zijlstra; Drake, Jeremy J.; Jochen Eisloffel; Farnhill, Hywel J. The Ionized Nebula surrounding the Red Supergiant W26 in Westerlund 1