\begin{table}%t2
\caption{\label{compara}Comparison between the oxygen abundance of the regions analyzed here and their previous estimations compiled from the %%@
literature.}
%\centerline
 {  \begin{tabular}{l@{\hspace{8pt}} c@{\hspace{6pt}}       c@{\hspace{12pt}}  c@{\hspace{12pt}}  c@{\hspace{12pt}}}   
  \hline \hline
\noalign{\smallskip}
 & & \multicolumn{2}{c@{\hspace{4pt}}}{12+$\log$(O/H)} & \\
\cline{3-4}
\noalign{\smallskip}
Galaxy & \Te &   This work & Previous W. &   Ref. \\
\noalign{\smallskip}
\tableline
\noalign{\smallskip}
HCG 31 AC	    & D  &8.22  $\pm$  0.05 & 8.31        & VC92 \\
                &    &              & 8.3 $\pm$ 0.2 &  R03 \\
HCG 31 A1       & EC &8.22 $\pm$ 0.10 & \nodata   &  \nodata \\
HCG 31 B	    & D  &8.14 $\pm$ 0.08 & 8.34 $\pm$ 0.20 & R03 \\
HCG 31 E	    & D  &8.13 $\pm$ 0.09 & \nodata & \nodata \\  
HCG 31 F1	    & D  &8.07 $\pm$ 0.06 & 8.1 $\pm$ 0.2 & R03 \\	
HCG 31 F2	    & D  &8.03 $\pm$ 0.10 & \nodata & \nodata \\	
HCG 31 G	    & D  &8.15 $\pm$ 0.07 & \nodata & \nodata	\\
HCG 31 H        & EC &8.3 $\pm$ 0.2   & \nodata & \nodata \\
Mkn 1087	    & EC &8.57 $\pm$ 0.10 & 8.55    &  VC92 \\
Mkn 1087 N	    & EC &8.23 $\pm$ 0.10 & \nodata & \nodata	\\
Mkn 1087 \#7    & EC &8.54 $\pm$ 0.10 & \nodata & \nodata \\
Haro 15 C	    & EC &8.37 $\pm$ 0.10 &  8.33   & S05	 \\
Haro 15 A	    & D  &8.10 $\pm$ 0.06 & \nodata & \nodata \\
Haro 15 B       & EC &8.21 $\pm$ 0.14 & \nodata & \nodata \\
Mkn 1199	    & D  &8.75 $\pm$ 0.12 &  8.19 $\pm$ 0.18  & IT98 \\ 
                &    &              &  9.13 &  GIT00 \\
Mkn 1199 NE     & EC &8.46 $\pm$ 0.13 &  \nodata & \nodata   \\
Mkn 5 A	        & D  &8.07 $\pm$ 0.04 &  8.04 $\pm$ 0.04 & IT99	 \\
Mkn 5 B         & EC &7.89 $\pm$ 0.17 & \nodata  &\nodata \\
IRAS 08208+2816 C & D  &8.33 $\pm$ 0.08 & 	\nodata & \nodata \\
IRAS 08208+2816 \#8& EC &8.64 $\pm$ 0.15 & \nodata & \nodata \\
IRAS 08339+6517	 & EC &8.45 $\pm$ 0.10 &	\nodata & \nodata   \\
IRAS 08339+6517 c.& EC &8.38 $\pm$ 0.10 &	\nodata & \nodata \\
POX 4	        & D  &8.03 $\pm$ 0.04 &	7.97 $\pm$ 0.02  & KS96\\
POX 4 comp.   	& EC &8.03 $\pm$ 0.14 &  \nodata & \nodata   \\
UM 420	        & D  &7.95 $\pm$ 0.05 &	7.93 $\pm$ 0.05  & IT98 \\
SBS 0926+606 A 	& D  &7.94 $\pm$ 0.08 &	7.95 $\pm$ 0.01  & IT98 \\
SBS 0926+606 B  & EC &8.15 $\pm$ 0.16 &	\nodata & \nodata \\
SBS 0948+532    & D  &8.03 $\pm$ 0.05 &	8.00 $\pm$ 0.01  & IT98 \\
SBS 1054+365    & D  &8.00 $\pm$ 0.07 &	7.97 $\pm$ 0.02  & IT98    \\
SBS 1054+365 b	& EC &8.13 $\pm$ 0.16 &   \nodata & \nodata \\
SBS 1211+540    & D  &7.65 $\pm$ 0.04 &	7.64 $\pm$ 0.01 & IT98 \\
SBS 1319+579 A$^a$	& D  &8.05 $\pm$ 0.06 &	8.13 $\pm$ 0.01 & ITL97 \\
                    &    &              &   8.09 $\pm$ 0.03 & IT99   \\
SBS 1319+579 B$^a$	& D  &8.12 $\pm$ 0.10 &	7.95 $\pm$ 0.10 & ITL97   \\
SBS 1319+579 C$^a$	& D  &8.15 $\pm$ 0.07 &	8.15 $\pm$ 0.03 & ITL97 \\
                    &    &              &   8.11 $\pm$ 0.01 & IT99	  \\
SBS 1415+437 C	& D  &7.58 $\pm$ 0.05 &	7.61 $\pm$ 0.01 & G03\\
SBS 1415+437 A	& D  &7.61 $\pm$ 0.06 &	7.62 $\pm$ 0.03 & G03	 \\
III Zw 107 A	& D  &8.23 $\pm$ 0.09 &	8.20  & KJ85 \\ 
                &    &              &   7.90  & G97	 \\
III Zw 107 B,C     & EC &8.31 $\pm$ 0.12 & \nodata & \nodata \\							
Tol 9	        & D  &8.57 $\pm$ 0.10 &	7.73 & KS86	 \\
Tol 1457-262 A	& D  &8.05 $\pm$ 0.07 &   8.23  & M94 \\
Tol 1457-262 B	& D  &7.88 $\pm$ 0.07 &  \nodata & \nodata \\
Tol 1457-262 C	& D  &8.06 $\pm$ 0.11 &	\nodata & \nodata \\
ESO 566-8	    & D  &8.46 $\pm$ 0.11 &  \nodata & \nodata \\
ESO 566-7	    & EC &8.50 $\pm$ 0.16 &  8.54 &  M91\\
NGC 5253 A	    & D  &8.18 $\pm$ 0.04 &  8.12 $\pm$ 0.06 & K97 \\
NGC 5253 B	    & D  &8.19 $\pm$ 0.04 &  8.19 $\pm$ 0.07 & K97	 \\
NGC 5253 C	    & D  &8.28 $\pm$ 0.04 &  8.16 $\pm$ 0.12 & K97	 \\
NGC 5253 D	    & D  &8.31 $\pm$ 0.07 & \nodata & \nodata	 \\
\noalign{\smallskip}
\tableline
  \end{tabular}}
\medskip
The second column indicates if \Te\ was computed using the direct method (D) or via empirical calibrations~(EC) in this work. $^a$ We follow ITL97 names in SBS~1319+579. Notice, however, than IT99 named region~A to SBS~1319+579~C and region~B to SBS~1319+579~A; they did %%@
not consider SBS 1319+579~B because of its higher uncertainties. 
References: G97: \citet{Gallego97}; GIT00: \citet*{GIT00}; G03: \citet{Guseva03}; IT98: \citet{IT98}; IT99: \citet{IT99}; KS96: \citet{KS96}; K97:  \citet{Kobulnicky97}; KJ85: \citet{KJ85}; KS86: \citet{KS86}; M91; \citet*{Masegosa91}; M94: \citet*{Masegosa94}; R03: \citet{R03}; S05: \citet{Shi05};  VC92: \citet{VC92}.
\vspace*{-2.5mm}
   \end{table}