[csours]

Source?

Are you referring to https://en.wikipedia.org/wiki/Kerogen?

At any rate, this is why I would like to see a better investigation of the subject

Better Kerogen wiki: https://wiki.aapg.org/Kerogen

[tim333]

Source this https://www.scirp.org/journal/paperinformation?paperid=92529

No idea if it's correct.