beamer 参考文献

\setbeamertemplate{bibliography item}[text]
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\begin{thebibliography}{10} % Beamer does not support BibTeX so references must be inserted manually as below
\bibitem{}
Y. Sun, L. Guan, Z. Chang, C. Li, and Y. Gao, “Design of a low-cost
indoor navigation system for food delivery robot based on multi-sensor
information fusion,” Sensors, vol. 19, no. 22, p. 4980, 2019.
  
\bibitem{}
I.-M. Chao, B. L. Golden, and E. A. Wasil, “The team orienteering
problem,” European journal of operational research, vol. 88, no. 3,
pp. 464–474, 1996.
\bibitem{}
B. L. Golden, L. Levy, and R. Vohra, “The orienteering problem,”
Naval Research Logistics (NRL), vol. 34, no. 3, pp. 307–318, 1987.
\bibitem{}
 T. Ilhan, S. M. Iravani, and M. S. Daskin, “The orienteering problem
with stochastic profits,” Iie Transactions, vol. 40, no. 4, pp. 406–421,
2008.
\bibitem{}
N. Labadie, R. Mansini, J. Melechovsky, and R. W. Calvo, “The team orienteering problem with time windows: An lp-based granular variable neighborhood search,” European Journal of Operational Research, vol. 220, no. 1, pp. 15–27, 2012.
\end{thebibliography}

\begin{thebibliography}{10}中的10是最大文献数
\bibitem{}{}里加引用标记
效果：