the interaction between human Norovirus and gastrointestinal microbial environment".

[LeentjeLovesScience]

I 'm searching for good scientific information on this topic :
"the interaction between human Norovirus and gastrointestinal microbial environment".
I don't find enough relevant articles on the free databases on internet.
Can someone advise me some good & free databases

or send me good articles ?
+ is there some software to organise articles in order to save all the articles and sites I found
and to make it easier to make the acknowledgement when writing a paper?
Thanks a lot!

(english is not my native english.. but i'm working on it.
the articles have to be in english.)