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\cite{dpapp,lindstrom}

\cite{whitworth1878} \cite{humphreys2010} \cite{dpapp,lindstrom} \cites[Lemma 10.7.2]{encylatt}[Ex.\ 2.7.2]{stanley2012}

\cite{shapiro1992} \cite{zhou2002}

\cite{A000108} \cite{A284016,A024485}

\cite[Theorem 10.4.1]{encylatt}

\cite[Theorem 10.4.5]{encylatt}

\cite[Theorem 10.4.5]{encylatt}

\cite[Theorem 10.4.5, second proof]{encylatt}

\cite{dpapp,lindstrom}

\cite[Lemma 10.7.2]{encylatt}

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