```tex % 这里给出了 bib 文件 \begin{filecontents}{example.bib} @Book{adams2003sobolev, title = {Sobolev Spaces}, publisher = {Academic Press}, year = {2003}, author = {Adams, R. A. and Fournier, J. J. F.}, series = {Pure and Applied Mathematics}, address = {New York}, isbn = {9780080541297}, } @Article{alnaes2015fenics, author = {Aln{\ae}s, M. and Blechta, J. and Hake, J. and Johansson, A. and Kehlet, B. and Logg, A. and Richardson, C. and Ring, J. and Rognes, M. E. and Wells, G.}, title = {The {FE}ni{CS} project version 1.5}, journal = {Archive of Numerical Software}, year = {2015}, volume = {3}, number = {100}, pages = {9--23}, doi = {10.11588/ans.2015.100.20553}, } \end{filecontents} \documentclass{article} \usepackage[round,semicolon]{natbib} \usepackage{lipsum} \bibliographystyle{abbrvnat} \begin{document} \citet{adams2003sobolev,alnaes2015fenics} \lipsum*[1]\citep{adams2003sobolev,alnaes2015fenics} \bibliography{example} \end{document} ```