[Tex/LaTex] inputenc error: problems reading in .bib file from jabref

bibtexinput-encodingsjabref

i'm relatively new to latex, so forgive me, if thats a silly one:
I'm using miktex and texstudio.
I keep getting the following error message, which prevent me from building up or compiling a document

"inputenc: Keyboard character used is undefined(inputenc) in inputencoding latin1'. 0.67bifeo3â
inputenc: Keyboard character used is undefined(inputenc) in inputencodinglatin1'. \newblock Développement par compression de l"

They first appeared, when i first cited a certain reference. I understand they are due to certain characters in the .bib file. So i changed the characters in the .bib file with jabref. That didn't work, then i deleted those citations from my document, didn't work either. Now i even started to build up a new .bib file, in which i type everything by hand. But even with that one and all citations removed, i keep getting this error message.
Anyone any ideas?
Thanks!!!

Best Answer

I think you should check the default encoding used by JabRef. The easiest way to go is asking for utf8 encoding and use biber + biblatex instead of bibtex. Biber understands utf8 and brings may new features, so you'll have no problem with accented letters.

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