Maurizio A. Bonuccelli Francesca Martelli Susanna Pelagatti Optimal Packet Scheduling in Tree-Structured LEO Satellite Clusters. 289-295 2004 9 MONET 4 http://dx.doi.org/10.1023/B:MONE.0000031588.69327.34 db/journals/monet/monet9.html#BonuccelliMP04