I am experiencing a rather weird issue. I am using some citations in a document and surprisingly some items are not parsed. My code is


    author    = "M. Chiari, L. Giuntini, P.A. Mando, N. Taccetii",
    title     = "Proton elastic scattering cross-section on boron from 0.5 to 3.3 MeV",
    journal   = "Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms",
    volume    = "184",
    number    = "3",
    pages     = "309-318",
    year      = "2001",
    month     = "November",


title = "The $^{11}B\left(p,\alpha_0\right)^8Be$ nuclear reaction and $^{11}B(p,p)^{11}B$ backscattering cross sections for analytical purposes ",
journal = "Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms ",
volume = "143",
number = "3",
pages = "244 - 252",
year = "1998",
note = "",
issn = "0168-583X",
doi = "http://dx.doi.org/10.1016/S0168-583X(98)00383-8",
url = "http://www.sciencedirect.com/science/article/pii/S0168583X98003838",
author = "M. Mayer and A. Annen and W. Jacob and S. Grigull",

title = "States in $^{12}C$ from resonant proton scattering ",
journal = "Journal de physique ",
volume = "38",
number = "1",
pages = "17 - 19",
year = "1977",
% note = "",
issn = "0168-583X",
doi = "http://dx.doi.org/10.1051/jphys:0197700380101700",
url = "http://jphys.journaldephysique.org/articles/jphys/abs/1977/01/jphys_1977__38_1_17_0/jphys_1977__38_1_17_0.html",
author = "Y. Rihet, A. Genoux-Lubain, H. Beaumevieille, R. Seltz, C. Gerardin,  D. Magnac-Valette ",




το ενεργειακό και γωνιακό εύρος(\cite[\eng{Chiari}]{Chiari}) καλύπτουν για την γωνία των $120^\circ$ τις ενέργειες $2250,2800\;keV$ για το
$^{11}Β$ (\cite[\eng{Mashkarov}]{Mashkarov}, \cite[\eng{Dejneko}]{Dejneko}) και όλο το ενεργειακό εύρος  για το $^{10}Β$
(\cite[\eng{Overley}]{Overley}). στην ενέργεια των $3300keV$(\cite[\eng{Rihet}]{Rihet}). Τέλος, λόγ $2250\;keV$(\cite[\eng{Mayer}]{Mayer}).
Η επιλογή των εν λ \cite[\eng{Mayer}]{Mayer} και \cite[\eng{Chiari}]{Chiari}, οι οποίες είναι πειραματικές, η απόδειξη της μη έντονης 
γωνιακής εξάρτησης φαίνεται από τα δεδομένα του \cite[\eng{Chiari}]{Chiari}.

and my output is

enter image description here

My compilation process is

  1. pdflatex -shell-escape file.tex
  2. biber file
  3. pdflatex -shell-escape file.tex

Any idea on why is this happening and how can it be fixed?

  • 1
    This is a VFAQ (very frequently asked question): author = "M. Chiari and L. Giuntini and P.A. Mando and N. Taccetii", Names must be joined by the and keyword. – egreg Sep 22 '14 at 13:21
  • @egreg : Thank's for your comments! Indeed adding and fixed partially the issue, but it doesn't fix the entries that are not in the .bib. For instance I would exept [Dejneo,;] for a code \cite[\eng{Dejneko}]{Dejneko}... – Thanos Sep 22 '14 at 13:34
  • I see no Dejneko entry. Besides the fact that the definitions of \eng and \greek are wrong. – egreg Sep 22 '14 at 13:38
  • 1
    I see, correctly, “([1, Chiari])” because the bib entry is present. Since no Dejneko or Mashkarov entry is in the MWE, the output shows just the missing keys. The correct form should be \newcommand{\eng}[1]{\textlatin{#1}} and \newcommand{\greek}[1]{\textgreek{#1}} – egreg Sep 22 '14 at 13:45

Browse other questions tagged or ask your own question.