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

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

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