If you want a more nuanced research on the history on deep learning in neural networks, here is an excellent historical survey paper: https://arxiv.org/abs/1404.7828
[The author of the paper mentioned on parent comment is Jürgen Schmidhuber - inventor of LSTMs and a very colorful character in neural land. The NYTimes did a nice profile on him a while back: https://www.nytimes.com/2016/11/27/technology/artificial-int... HN Discussion: https://news.ycombinator.com/item?id=13066646]