Ian Bennallack (2010). Bennallick, I A; Pearman, D A (eds.). "Centaurium scilloides, Juncus subnodulosus and Phegopteris connectilis re-discovered in Cornwall after many years". Botanical Cornwall (14). Truro: Environmental Records Centre for Cornwall & the Isles of Scilly (ERCCIS): 36–42. ISSN1364-4335.