So, for anyone not aware: Schmidhuber is _obsessed_ with this. He wrote an enormous literature review of deep learning [0] basically because he felt that people weren't crediting ideas enough. This isn't a one-off essay, for him, he's been banging this drum for quite a while.
Not saying he's wrong, just FYI.
[0] http://arxiv.org/abs/1404.7828