authorities for fungi

[There's a fungus among us]

Hi

I am currently writing my MSc thesis and am in need of the authorities of 
various fungi (e.g. Alternaria brassicae (Berk.) Sacc.). I have no idea 
where to begin to look to find them. If anybody out there can point me in 
the direction of a book(s) or paper(s) or can tell me what the 
authorities are it would be greatly appreciated.

Thanks (:

email - lboyko at gpu.srv.ualberta.ca

Here's the list:
Gonatobotrys simplex

Nectria inventa

Nectria rolfsii

Nectria bacterioides

Botrytis cinerea

Sclerotinia sclerotiorum