chorochronos : a research network for spatiotemporal database systems acm sigmod record
andrew frank , stephane grumbach , ralf hartmut g &#252; ting , christian s. jensen , manolis koubarakis , nikos lorentzos , yannis manolopoulos , enrico nardelli , barbara pernici , hans-j &#246; rg schek , michel scholl , timos sellis , babis theodoulidis , peter widmayer