I'm not so sure. The web is primarily a conglomerate of user feedback and vendor product pushing. Most of the goolge hits come back as forum hits. Searching for articles is fruitless frequently, other than a couple of monthly online publications. The majority of information in this hobby was developed prior to this decade, which is when the internet took off. I would argue that it is reasonable to expect most information is exchanged word of mouth without much need for explanation. The only issues you find proof of are the issues which are controversial.
For example, there is very little evidence to support hyposalinity as an ich cue. Just word of mouth.
I will try to find something in written form. Clearly this concept came from somewhere and the information was distributed in some form. Otherwise you would not find it mentioned in multiple word-of-mouth situations on the internet forums. This doesn't explain why, but the fact that many hobbyists have success with higher alkalinity is, in and of itself, very usefull information.