Respiration in Aquatic Insects:

http://www.cals.ncsu.edu/course/ent425/tutorial/aquatic.html

Aquatic Insect Respiration:

http://thedragonflywoman.com/2010/02/11/aqinsectresp/

Respiration in Aquatic Organisms:

http://www.marietta.edu/~biol/aquatic/sextant/respire.htm (compares various methods of aquatic respiration)

Plastron Respiration by Aquatic Insects (collection of images related to plastron respiration):

http://websrv.mece.ualberta.ca/mrflynn/bio.html

Could humans make use of beetle-inspired plastron breathing?:

http://www.sciforums.com/showthread.php?t=99874 (forum open to debate)

Argyroneta aquatica: Water Spider:

http://eol.org/pages/1200199/overview

Argyroneta aquatica (Water Spider):

http://www.the-piedpiper.co.uk/th11f(5).htm

Underwater spiders use webs as 'gills':

http://www.nature.com/news/2011/110609/full/news.2011.357.html

Diving bell spider – Argyroneta aquatica:

http://cabinetoffreshwatercuriosities.com/2010/11/11/diving-bell-spider/

SuperHydroPhobic Coating:

http://superhydrophobiccoating.com/

Water spider (Argyroneta aquatica):

http://www.arkive.org/water-spider/argyroneta-aquatica/ (Photo gallery)

Some cool Videos

Argyroneta aquatica - The amazing water spider:

http://www.youtube.com/watch?v=JqyhhSzv4Hs

The diving techniques of bell spiders (water spiders):

http://www.youtube.com/watch?v=1_zvA8Ak7hY&feature=fvwrel

Argyroneta aquatica (Water Spider) - Edit 2:

http://www.youtube.com/watch?v=m-ezAuWtNEo