John A. Hertz, Anders Krogh, Benny Lautrup, Torsten Lehmann. Nonlinear backpropagation: doing backpropagation without derivatives of the activation function. IEEE Transactions on Neural Networks, 8(6):1321-1327, 1997. [doi]
@article{HertzKLL97,
title = {Nonlinear backpropagation: doing backpropagation without derivatives of the activation function},
author = {John A. Hertz and Anders Krogh and Benny Lautrup and Torsten Lehmann},
year = {1997},
doi = {10.1109/72.641455},
url = {http://dx.doi.org/10.1109/72.641455},
researchr = {https://researchr.org/publication/HertzKLL97},
cites = {0},
citedby = {0},
journal = {IEEE Transactions on Neural Networks},
volume = {8},
number = {6},
pages = {1321-1327},
}