BibTeX, biblatex and biber ⇒ Missing information in references leads to sloppy look.

[paristhecure]

For some citations, I do not have page number or other information. For example, not all conference papers specify page numbers. When I do not enter these information, the reference shows up sloppy.

For example:
[3] Penner JE. Eects of soot aerosols from aircraft on cirrus cloud. In: DSVS International Workshop on Aviation. 2008,.

As seen, the reference finishes with ",." instead of simply "."

Another example is:

[5] Smith GP, Golden DM, Frenklach M, Moriarty NW,Eiteneer B, Goldenberg M, et al. GRI-Mech 3.0. http://www.me.berkeley.edu/gri_mech/; ????

As seen, the missing year appears as ????.

Is there a way to let latex know what parts are missing so it ignores that part. Obviously leaving that section blank does not work. I also cannot change the styling because this is the style for the journal that I am planning to submit my paper.

Thank anyone in advance.

[philosopher]

LaTeX with the plain bibliographystyle correctly formats a bib rec that has no year or page number. I know that's no help to you, but it suggests that the fault lies with the style, not with LaTeX. Perhaps there is a different style that is "close enough" for this journal? Or you might try making a custom style with makebst.tex -- I don't know if it handles empty years or page numbers gracefully. One other thought: do you have a null entry for year/page, or no entry at all?