The single most informative source is Rene Zandbergen's site voynich.nu
It's a large site and fnding things is not always easy. Anyway, the manuscript has been studied for over a century, so it's unavoidable that the volume of published observations and theories is quite large. Everything you read on voynich.nu has been carefully collected and reviewed by Rene, so searching through it is certainly worth the effort.
A simple way to search the site is adding site:voynich.nu to a google search.
Some links:
About parallels for the zodiac diagrams: You are not allowed to view links. Register or Login to view.
About month names added at the bottom of the medallions: You are not allowed to view links. Register or Login to view.
About line initial words like dshedy: unluckily, there's only a place-holder at the bottom of this page: You are not allowed to view links. Register or Login to view. You can refer to this post by Emma May Smith: You are not allowed to view links. Register or Login to view.
About characters apparently added at paragraph start: see "Grove words" here (by Jorge Stolfi):
You are not allowed to view links. Register or Login to view.
An excellent but now very old and partially outdated introduction: Mary D'Imperio You are not allowed to view links. Register or Login to view. (1978). It would be great to have a "revised edition", or something that could authoritatively replace it, but I don't think it exists at the moment.
It's a large site and fnding things is not always easy. Anyway, the manuscript has been studied for over a century, so it's unavoidable that the volume of published observations and theories is quite large. Everything you read on voynich.nu has been carefully collected and reviewed by Rene, so searching through it is certainly worth the effort.
A simple way to search the site is adding site:voynich.nu to a google search.
Some links:
About parallels for the zodiac diagrams: You are not allowed to view links. Register or Login to view.
About month names added at the bottom of the medallions: You are not allowed to view links. Register or Login to view.
About line initial words like dshedy: unluckily, there's only a place-holder at the bottom of this page: You are not allowed to view links. Register or Login to view. You can refer to this post by Emma May Smith: You are not allowed to view links. Register or Login to view.
About characters apparently added at paragraph start: see "Grove words" here (by Jorge Stolfi):
You are not allowed to view links. Register or Login to view.
An excellent but now very old and partially outdated introduction: Mary D'Imperio You are not allowed to view links. Register or Login to view. (1978). It would be great to have a "revised edition", or something that could authoritatively replace it, but I don't think it exists at the moment.
![[+]](https://www.voynich.ninja/images/collapse_collapsed.png)