Which one was published first, 'Fast frequency-hopping dynamic multiple-access for cognitive radios: Suboptimum noncoherent maximum-likelihood multiuser detection' or 'DC charger selection scheme for electric vehicle-based tours visiting multiple destinations'?
Between 'Fast frequency-hopping dynamic multiple-access for cognitive radios: Suboptimum noncoherent maximum-likelihood multiuser detection' and 'DC charger selection scheme for electric vehicle-based tours visiting multiple destinations', which paper was published earlier?
SELECT DISTINCT ?answer WHERE { <https://dblp.org/rec/conf/iswcs/ZhangYZ10> <https://dblp.org/rdf/schema#yearOfPublication> ?x . <https://dblp.org/rec/conf/racs/LeeP14> <https://dblp.org/rdf/schema#yearOfPublication> ?y . BIND(IF(?x < ?y, <https://dblp.org/rec/conf/iswcs/ZhangYZ10>, <https://dblp.org/rec/conf/racs/LeeP14>) AS ?answer) }
<https://dblp.org/rec/conf/iswcs/ZhangYZ10> <https://dblp.org/rec/conf/racs/LeeP14>