EDIT

the bibliography is assembled by making use of the cdm datportal footnote system. The FootnoteManager is not fully de-duplicating original sources which differ in some details:

1)

Have different name in source information. This can bee seen at the example of Calamus aruensis in the Palmweb portal.

The bibliography of Calamus aruensis contains the following entries:

 W.J. Baker & R.P Bayton & J. Dransfield & R.A Maturbongs, A revision of the Calamus aruensis (Arecaceae) complex in New Guinea and the Pacific. 2003
 in - Govaerts, R. & Dransfield, J., World Checklist of Palms (as Calamus aruensis Becc.)
 in - Govaerts, R. & Dransfield, J., World Checklist of Palms (as Calamus latisectus Burret)
 in - Govaerts, R., World Checklist of Seed Plants (as Calamus latisectus Burret)
 in - Govaerts, R. & Dransfield, J., World Checklist of Palms (as Palmijuncus aruensis (Becc.) Kuntze)
 in - Govaerts, R. & Dransfield, J., World Checklist of Palms (as Calamus hollrungii Becc.)
 in - Govaerts, R., World Checklist of Seed Plants (as Calamus hollrungii Becc.)
 in - Govaerts, R., World Checklist of Seed Plants (as Calamus aruensis Becc.)

which should be de-duplicated to a form, in which the name used in source information for each citation is assembled, like:

 W.J. Baker & R.P Bayton & J. Dransfield & R.A Maturbongs, A revision of the Calamus aruensis (Arecaceae) complex in New Guinea and the Pacific. 2003
 in - Govaerts, R. & Dransfield, J., World Checklist of Palms (as Calamus aruensis Becc., Calamus latisectus Burret, Palmijuncus aruensis (Becc.) Kuntze, Calamus hollrungii Becc.)
 in - Govaerts, R., World Checklist of Seed Plants (as Calamus latisectus Burret, Calamus hollrungii Becc., Calamus aruensis Becc.)

2)

Duplicate references with same title but differing in details like Reference.uri (see #4383#note-11, #4383#note-12)

TODO:

• adapt tests, see r21741