The e-magazine Bateaux has published three articles on junks ans junk rig. More is underway.
In French :
https://www.bateaux.com/article/47213/les-jonques-un-patrimoine-nautique-aux-multiples-visages
https://www.bateaux.com/article/47319/le-greement-de-jonque-un-greement-mal-connu-mais-pourquoi-pas-le-greement-ideal
https://www.bateaux.com/article/47320/qu-est-ce-qui-caracterise-une-voile-de-jonque-comment-marche-ce-greement
And in English on www.boatnews.com:
https://www.boatnews.com/story/47213/junks-a-multi-faceted-nautical-heritage
https://www.boatnews.com/story/47319/le-greement-de-jonque-un-greement-mal-connu-but-why-not-le-greement-ideal
https://www.boatnews.com/article/47320/what-characterizes-a-junk-sail-how-does-this-rig-work