In the year 2001 in CoRR, what are the titles of the research papers on Number portability?
In CoRR in 2001, what are the titles of the papers on Number portability?
SELECT DISTINCT ?answer WHERE { <https://dblp.org/rec/journals/corr/cs-CY-0110045> <https://dblp.org/rdf/schema#publishedIn> 'CoRR' . <https://dblp.org/rec/journals/corr/cs-CY-0110045> <https://dblp.org/rdf/schema#yearOfPublication> '2001' . <https://dblp.org/rec/journals/corr/cs-CY-0110045> <https://dblp.org/rdf/schema#title> ?answer }
<https://dblp.org/rec/journals/corr/cs-CY-0110045>