documentclass{article}
usepackage[backend=bibtex]{biblatex}
addbibresource{sample.bib}
begin{document}
section{First part}
begin{refsection}
See the following: cite{a,b,c}

begin{tabular}{|l|l|l|}
hline
a & b & c\
hline
begin{minipage}{8cm}vspace{2mm}printbibliography[heading=subbibliography]end{minipage} & d & e\
hline
end{tabular}
end{refsection}

begin{refsection}
section{Second part}
See also: cite{d,e}
printbibliography[heading=subbibliography]
end{refsection}

end{document}