Gossen's second law

Singularity is Near. Penguin Books. 2005. ISBN 0-14-303788-9.  戈森第二定律（英语：Gossen's second law） 品質 效益成本比率（英语：Benefit–cost ratio） 成本效用分析 成本效益比 （页面存档备份，存于互联网档案馆）

Asymmetrical Probability Curve", 1896, Phil Mag "The Compound law of Error", 1896, Phil Mag Entries: "Gossen", "Index Numbers", "Intrinsic Value", "Jenkin", "Jennings"