deletions | additions       diff --git a/Fitting.tex b/Fitting.tex  index dddd737..fad18af 100644  --- a/Fitting.tex  +++ b/Fitting.tex 
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\href{http://lmfit.github.io/lmfit-py/}{lmfit} library~\cite{c09228b4-321a-404b-8f8c-e56696295eda}.  Every fit model is, in fact, an \verb|lmfit.Model| object, and these object  can be created and modified by calling directly \verb|lmfit| functions.  We refer Example of defining and modifying models for fitting are provided in  the interested FRETBursts tutorial.   Interested  users should also refer  to the excellent lmfit documentation. \subsubsection{Correction coefficients}