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Hi, I think I discovered a bug in the 'num' alternative of the bib module. It seems to be incompatible with the prefix=+ option of referencing. The following example gives an unknow reference: % tex file \usemodule[bib] \setupbibtex[database=biblio] \setuppublications[alternative=num] \setuphead[chapter][prefix=+] % <<<< OK if commented \starttext \chapter[chap:one]{One} % <<<< OK if commented Text \cite[test] text. \completepublications \stoptext % bib file biblio.bib @BOOK{test, title = {T}, publisher = {P}, year = {Y}, author = {A} } By the way, the 'num' alternative also gives an unknow reference when \completepublications is not present, while the default alternative is OK. Is there a particular reason for this? Thanks. Greetings, Morgan