deletions | additions       diff --git a/bibliography/biblio.bib b/bibliography/biblio.bib  index b363336..ba81c74 100644  --- a/bibliography/biblio.bib  +++ b/bibliography/biblio.bib 
...
title = {{First continuous measurements of $\updelta$$\less$sup$\greater$18$\less$/sup$\greater$O-{CO}$\less$sub$\greater$2$\less$/sub$\greater$ in air with a Fourier transform infrared spectrometer}},  journal = {Atmos. Meas. Tech.},  }  @article{Wen_2008,  doi = {10.1016/j.jhydrol.2007.11.021},  url = {http://dx.doi.org/10.1016/j.jhydrol.2007.11.021},  year = {2008},  month = {feb},  publisher = {Elsevier {BV}},  volume = {349},  number = {3-4},  pages = {489--500},  author = {Xue-Fa Wen and Xiao-Min Sun and Shi-Chun Zhang and Gui-Rui Yu and Steve D. Sargent and Xuhui Lee},  title = {{Continuous measurement of water vapor D/H and 18O/16O isotope ratios in the atmosphere}},  journal = {Journal of Hydrology},  }