@article{kessler_j4,
 author = {Christoph W. Ke{\ss}ler},
 title = {Scheduling {E}xpression {DAG}s for {M}inimal {R}egister {N}eed},
 journal = {Computer Languages},
 volume = {24},
 number = 1,
 pages = {33--53},
 month = September,
 year = 1998
}