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% Define references here
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\newwrite \reffile 
\immediate \openout \reffile =\jobname.ref
\newcount \refnum \refnum =0
\def \ref #1: #2{\global \advance \refnum by 1 \expandafter \xdef 
    \csname ref#1\endcsname {\the \refnum }\immediate \write \reffile 
    {\noexpand \item {[\csname ref#1\endcsname ]}{#2}}}
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% Just follow this style to add more references.  Note that in the body
% of the paper, the Cayley reference is referred to as \refCayley (i.e.,
% this expands to the reference number), etc.
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\ref Concrete: {R.L. Graham, D.E. Knuth, O. Patashnik,
 {\sl Concrete Mathematics}, Addison-Wesley, 1994.}
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\ref AdvCom: {L. Comtet, {\sl Analyse Combinatoire},2, Presses Univ.
de France, 1970.}
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\ref deB: {N. G. de Bruijn, {\sl Asymptotic Methods in Analysis\/},
North-Holland, 1961.}
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\ref Cara: {C. Carath\'eodory, {\sl Theory of Functions of a Complex
Variable}, Chelsea, 1954.}
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\ref Comtet: {L. Comtet, {\sl C. R. Acad. Sc. Paris\/}, 270, 1970, 
p. 1085--1088.}
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\ref Wpap: {R. M. Corless, G. H. Gonnet, D. E. G. Hare, 
D. J. Jeffrey and D. E. Knuth, ``The Lambert $W$ Function'',
Advances in Computational Mathematics, to appear.}
%
\ref David: {F.N. David and D.E. Barton, {\sl Combinatorial Chance},
Hafner, 1962.}
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\ref Niel: {N. Nielsen, {\sl Handbuch der Theorie der Gammafunktion},
Teubner, 1906.}
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\ref Rior: {J. Riordan, {\sl An Introduction to Combinatorial
Analysis}, Wiley, 1958.}
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\immediate \closeout \reffile 
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% End of references
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