the problem that I have is that some references appears as numbers and some of them appears as author names. The problem is that I only want numbers. The .tex compiles without any error. I tried to edit the bib file but still the reference appears in names and numbers. I tried deleting the .blb file and compile again but nothing was changed. I tried to delete the .aux file and compile again but still it didn't correct anything. The bibliography file was created using BibDesk. I have upload an image to check it out.