Latest hot-water treatment advice for nematode and basal rot control in daffodil bulbs, Horticultural Development Center, August 2013

“Hot Water Treatment of Daffodil Bulbs,” Tom Stettner, Midwest Region Newsletter, Fall 2009

Hot Water Treatment of Narcissus Bulbs, UK Ministry of Agriculture, Fisheries and Food, 1977

Warmwaterbehandeling van narcissen en Fusarium-bolrot, Dr. B.H.H. Bergman, Laboratorium voor Bloembollenonderzoek te Lisse, January 1962

“How Ramsbottom gave New Life to the Narcissus,” Matthew Zandbergen; RHS Daffodil Yearbook

Warm-waterbehandeling van narcissen en bolrot, Prof. E. van Slogteren; Laboratorium voor bloembollenonderzoek te Lisse, August 1931