Where to find about WEP(wired equivalent privacy) algorithm

I've been recently working on how to break into wireless network

protected by WEP but there are lots of documents talking about

general logics and vulnerabilities of WEP like vulnerabilities of KSA of RC4

or too short IV bits. Now I have big picture

of how this WEP works but in order to understand it perfectly or maybe not

perfectly but to understand as far as I could, I need official documents.

First I thought I could get these documents by searching keywords something

like this "ieee 802.11 WEP" or "rfc 802.11 WEP" but all I could get from Google

was more about breaking WEP not fundamental logics of WEP. If I needed to

just break into wireless network protected by WEP I could simply google some

commands but I need to know exactly what's happening inside these programs

like aircrack-ng suite. By the way, I'm using my own AP for penetration.