I'm looking for a good introduction to the critical generelized KdV equation $$u_t +u_{xxx}+5u^4u_x = 0 \, , $$ $$ u(t=0,x) = u_0 (x) \, , \qquad x\in \mathbb{R} \, ,$$ and its blowup solutions. There are some papers on the topic, but I'm looking for more of an overview - lecture notes, video, book chapter or a review.
Any ideas?