1. [Liquid Time-Constant Networks (2020)](https://arxiv.org/abs/2006.04439)
This is essentially a neural ODE applied to leaky integrate-and-fire.
2. [Closed-form Continuous-time (2022)](https://arxiv.org/abs/2106.13898)
A closed-form approximation of the first.
[1] https://www.liquid.ai/blog/liquid-neural-networks-research
[1] https://www.liquid.ai/blog/liquid-neural-networks-research