[OS X TeX] citation in text fail to appear as expected

[konstantinos vasilakos]

Hi,

\bibliographystyle{plain}

I have it in the end of the .text

and also 

\bibliography{nameBibFile}

---->
LaTeX Warning: Citation `citeulike:257255' on page 2 undefined on input line 24
.


LaTeX Warning: Citation `citeulike:1468371' on page 2 undefined on input line 2
8.


LaTeX Warning: Citation `citeulike:1468371' on page 2 undefined on input line 3
1.

(./Untitled.bbl [2]) [3] (./Untitled.aux)

LaTeX Warning: There were undefined references.


Though the references are been created correctly in the end of my page.

Thanks
\K.
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