The following publications are possibly variants of this publication: 
- Synchronization in the presence of unknown, nonuniform and arbitrarily large communication delayMeirong Zhang, Ali Saberi, Anton A. Stoorvogel. ejcon, 38:63-72, 2017.  [doi] 
- Scale-free collaborative protocol design for state synchronization of multi-agent systems in presence of unknown nonuniform and arbitrarily large communication delaysZhenwei Liu 0001, Donya Nojavanzadeh, Ali Saberi, Anton A. Stoorvogel. ejcon, 66:100660, 2022.  [doi] 
- Passivity based delayed state synchronization of discrete-time multi-agent systems in presence of unknown communication delaysZhenwei Liu, Ali Saberi, Anton A. Stoorvogel. amcc 2018: 5207-5212 [doi]