参考文献
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Haagsma, R. (2012). A convenient utility function with Giffen behaviour. ISRN Economics, 2012, Article 608645. https://doi.org/10.5402/2012/608645 ↩ 高级模型
Kugler, P., & Andrews, K. (1996). Graphical analysis and the visually impaired in undergraduate economics courses. The Journal of Economic Education, 27(3), 224–228. https://doi.org/10.1080/00220485.1996.10844911 ↩ 主题
thriveth. (2014, January 22). A color blind/friendly color cycle for Matplotlib line plots [Source code]. GitHub Gist. https://gist.github.com/thriveth/8560036 ↩ 主题