Richard L Snyder,J Paulo de Melo-Abreu.Frostprotection:fundamentals,practice,and economics:Vol 1[M]//FAO.environment and natural resources series 10.Rome:Environment and Natural Resources Service Publications,2005.
Furuta Mikio,Araki Shinsuke.Frost protection apparatus using high frost protection fan having multiple head (multi-head system ; several sets) and frost protection method using the same:JP,JP2006109804[P].2006-04-27.
[7]
Furuta Mikio.Automatically foldable extensible frost protection fan apparatus:JP,JP2007089514[P].2007-04 -12.