1. Connext network https://connext.network/ Connext network https://connext.network/
2. Introducing outpace: Off-chain unidirectional trustless payment channels https://medium.com/the-adex-blog/introducing-outpace-off-chain-unidirectional-trustless-payment-channels-243a08e152a Introducing outpace: Off-chain unidirectional trustless payment channels https://medium.com/the-adex-blog/introducing-outpace-off-chain-unidirectional-trustless-payment-channels-243a08e152a
3. Raiden network https://raiden.network/ Raiden network https://raiden.network/
4. Althoff M.: On computing the minkowski difference of zonotopes. arXiv preprint arXiv:1512.02794 (2015) Althoff M.: On computing the minkowski difference of zonotopes. arXiv preprint arXiv:1512.02794 (2015)