[1] [CITE@ja[「冥王星」はアニメでどう描かれてきたのか - 大匙屋@セミリタイア]]
([[大匙屋]] 著, [TIME[2015-07-19 10:20:27 +09:00]] 版)
<http://sajiya.blog89.fc2.com/blog-entry-491.html>

[2] [CITE[Kyoto University Research Information Repository: 天界雜報]]
([TIME[2018-03-23 14:38:34 +09:00]])
<https://repository.kulib.kyoto-u.ac.jp/dspace/handle/2433/161550>

[4] [CITE[Kyoto University Research Information Repository: Vol.10 No.110]]
(超海王星發見記念號)
([TIME[2018-09-03 22:51:45 +09:00]])
<https://repository.kulib.kyoto-u.ac.jp/dspace/handle/2433/159222>