I'm researching about fractals history and one of its main contributor and promoter Benoit Mandelbrot.
As far as I'm concerned, when he published his first book about this subject in 1975, he was severely criticized and questioned. Later, as he published more books and expanded this subject, he started to get accepted by most mathematicians.
Where could I find proofs about the first? For example, any book or science / math magazine of the time criticizing him (or similar).