sfchap.sty

\def\@makechapterhead#1{%
 % \vspace*{50\p@}%
  {\parindent \z@ \centering
    \normalfont
    \ifnum \c@secnumdepth >\m@ne
        \bfseries \@chapapp\space \thechapter
        \par\nobreak
        \vskip 20\p@
    \fi
    \interlinepenalty\@M
    \bfseries #1\par\nobreak
    \vskip 20\p@
  }}
\def\@schapter#1{\if@twocolumn
                   \@topnewpage[\@makeschapterhead{#1}]%
                 \else
                   \@makeschapterhead{#1}%
                   \@afterheading
                 \fi}
\def\@makeschapterhead#1{%
  %\vspace*{50\p@}%
  {\parindent \z@ \centering
    \normalfont
    \interlinepenalty\@M
    \bfseries  #1\par\nobreak
    %\vskip 40\p@
  }}



\def\thebibliography#1{%
  \chapter*{%  
    REFERENCES\@mkboth{REFERENCES}{REFERENCES}}
  \vskip 20\p@
  \addcontentsline{toc}{chapter}{REFERENCES}
  \list{\relax}{\setlength{\labelsep}{0em}
                \setlength{\itemindent}{-\bibhang}
                \setlength{\leftmargin}{\bibhang}}
  \def\newblock{\hskip .11em plus .33em minus .07em}
  \sloppy\clubpenalty4000\widowpenalty4000
  \sfcode`\.=1000\relax}

\def\@citex[#1]#2{\if@filesw\immediate\write\@auxout{\string\citation{#2}}\fi
  \def\@citea{}\@cite{\@for\@citeb:=#2\do
    {\@citea\def\@citea{; }\@ifundefined
      {b@\@citeb}{{\bf ?}\@warning
      {Citation '\@citeb' on page \thepage \space undefined}}%
{\csname b@\@citeb\endcsname}}}{#1}}

\let\@internalcite\cite
\def\cite{\def\citename##1{##1}\@internalcite}
\def\shortcite{\def\citename##1{}\@internalcite}

\def\thechapter{\Roman{chapter}}