Update citing_yade.bib: uppercase "DEM" instead of "Dem" when output by BibTex.
Enabling uppercase "DEM" instead of "Dem" in doc references as output on website.
Note (for those who would like to investigate it right now, not me..) that the correct LaTeX/BibTex interpretation of \v{S}milauer and "and others" is currently broken in some places of the website
- https://yade-dem.org/doc/publications.html#citing-yade outputs "V. vSmilauer, others"
- https://yade-dem.org/doc/citing.html gives the correct output "V. Šmilauer et al."