Name the authors of the paper 'Periodic hidden Markov model-based workload clustering and characterization'.
'Periodic hidden Markov model-based workload clustering and characterization' was authored by which authors?
SELECT DISTINCT ?answer WHERE { <https://dblp.org/rec/conf/IEEEcit/LiY08> <https://dblp.org/rdf/schema#authoredBy> ?answer }
<https://dblp.org/rec/conf/IEEEcit/LiY08>