Since you highlight it in episode 70, I thought I'd share the link:
https://teoriaevolutiva.files.wordpress.com/2014/02/gissis-s-b-y-jablonka-e-eds-transformations-of-lamarckism.pdf
I can't speak for the legality of that, but if anyone wants to read it without paying usurous academic-press prices, well, there it is.
(Anyone who has a library card on the New York Public library — which are available to anyone who lives in the state, by the way — can read it without any legality questions as an ebook on their web site. And some academics may have access to it on project muse: https://muse.jhu.edu/book/39741 )
If you've only got time for one article, the one I found most useful as an introduction was "Lamack's Dangerous Idea" by Newman & Bhat.