-- Database schema
| Author : Id [ INTEGER ] primary_key , Name [ TEXT ] , Affiliation [ TEXT ] | Conference : Id [ INTEGER ] primary_key , ShortName [ TEXT ] , FullName [ TEXT ] , HomePage [ TEXT ] | Journal : Id [ INTEGER ] primary_key , ShortName [ TEXT ] , FullName [ TEXT ] , HomePage [ TEXT ] | Paper : Id [ INTEGER ] primary_key , Title [ TEXT ] , Year [ INTEGER ] , ConferenceId [ INTEGER ] Paper.ConferenceId = Conference.Id , JournalId [ INTEGER ] Paper.JournalId = Journal.Id , Keyword [ TEXT ] | PaperAuthor : PaperId [ INTEGER ] PaperAuthor.PaperId = Paper.Id , AuthorId [ INTEGER ] PaperAuthor.AuthorId = Author.Id , Name [ TEXT ] , Affiliation [ TEXT ] |
-- -- Gives the home page of the conference where the paper "Increasing the Concurrency in Estelle" is presented.

SELECT DISTINCT T2.HomePage FROM Paper AS T1 INNER JOIN Conference AS T2 ON T1.ConferenceId = T2.Id WHERE T1.Title = 'Increasing the Concurrency in Estelle';