A branch and bound algorithm for scheduling chains with nonnegative timelags, arbitrary processing times and release times to minimize sum of completion times

A Polynomial algorithm for 1|outtree(l<​p); p_{i}= p; r_{i}|C_{max}

Scheduling tasks with outtree precedence graph, constant timelags and variable release times on a single machine

Scheduling chains with constant time lags and variable release times on a single machine