\begin{table}%t7
%\centering
\par
 \caption{\label{tab7}Mean difference between our $\log gf$ values and those adopted in the literature.}
\small 
\begin{tabular}{lrr}
\hline\hline                
{Reference}  & {This work -- literature} & \# lines  \\
\hline    
Blackwell et~al. (\cite{Blackwell1980})     & 0.15 ($\sigma = 0.09$) & 41 \\
Gurtovenko \& Kostik (\cite{Gurtovenko1989}) & 0.21 ($\sigma = 0.05$) & 55 \\
Lambert et~al. (\cite{Lambert1996}) & --0.01 ($\sigma = 0.06$) & 24 \\
Fulbright (\cite{Fulbright2000})      & --0.01 ($\sigma = 0.07$) & 26 \\
Bensby et~al. (\cite{Bensby2003})  &  0.11 ($\sigma = 0.08$) & 37 \\
Chen et~al. (\cite{Chen2003})    &  0.07 ($\sigma = 0.04$) & 16 \\
Fran{\c c}ois et~al. (\cite{Francois2003}) & --0.09 ($\sigma = 0.12$) & 12 \\
Gratton et~al. (\cite{Gratton2003}) & --0.02 ($\sigma = 0.08$) & 42 \\
Gratton et~al. (\cite{Gratton2003}) ($\lambda > 4600$~\AA) & 0.00 ($\sigma = 0.06$) & 34  \\
Korn et~al. (\cite{Korn2003})    &  0.05 ($\sigma = 0.07$) & 35 \\
Reddy et~al. (\cite{Reddy2003})   & --0.01 ($\sigma = 0.04$) &  9 \\
Sneden et~al. (\cite{Sneden2003})  &  0.02 ($\sigma = 0.09$) & 11 \\
Nissen et~al. (\cite{Nissen2004})  &  0.04 ($\sigma = 0.06$) & 19 \\
Santos et~al. (\cite{Santos2004})  &  0.01 ($\sigma = 0.03$) & 12 \\
Aoki et~al. (\cite{Aoki2005})    &  0.01 ($\sigma = 0.11$) & 19 \\
Sadakane et~al. (\cite{Sadakane2005}) & 0.02 ($\sigma = 0.06$) & 11 \\
Ivans et~al. (\cite{Ivans2006})   &  0.02 ($\sigma = 0.11$) & 19 \\
Randich et~al. (\cite{Randich2006}) &  0.06 ($\sigma = 0.06$) & 10 \\  
Sousa et~al. (\cite{Sousa2008})   &  0.00 ($\sigma = 0.07$) & 31 \\
\hline                                 
\end{tabular}
\end{table}