This is BibTeX, Version 0.99c (Web2C 7.3.7x) The top-level auxiliary file: rapport.aux Case mismatch error between cite keys ku and KU ---line 15 of file rapport.aux : \citation{ku : } I'm skipping whatever remains of this command White space in argument---line 48 of file rapport.aux : \citation{That's : not a rotation} I'm skipping whatever remains of this command White space in argument---line 49 of file rapport.aux : \citation{it's : a phase shift. A rotation would have sines and cosines outside diagonal} I'm skipping whatever remains of this command I found no \bibdata command---while reading file rapport.aux I found no \bibstyle command---while reading file rapport.aux You've used 8 entries, 0 wiz_defined-function locations, 94 strings with 554 characters, and the built_in function-call counts, 0 in all, are: = -- 0 > -- 0 < -- 0 + -- 0 - -- 0 * -- 0 := -- 0 add.period$ -- 0 call.type$ -- 0 change.case$ -- 0 chr.to.int$ -- 0 cite$ -- 0 duplicate$ -- 0 empty$ -- 0 format.name$ -- 0 if$ -- 0 int.to.chr$ -- 0 int.to.str$ -- 0 missing$ -- 0 newline$ -- 0 num.names$ -- 0 pop$ -- 0 preamble$ -- 0 purify$ -- 0 quote$ -- 0 skip$ -- 0 stack$ -- 0 substring$ -- 0 swap$ -- 0 text.length$ -- 0 text.prefix$ -- 0 top$ -- 0 type$ -- 0 warning$ -- 0 while$ -- 0 width$ -- 0 write$ -- 0 (There were 5 error messages)