Письмо проф. Хайдена в EPA
Oct. 29th, 2009 01:53 pm![[personal profile]](https://www.dreamwidth.org/img/silk/identity/user.png){kind=small}
birdwatcherс однобуквенным доказательством
http://www.stephankinsella.com/wp-content/uploads/2009/10/HaydenToJackson.pdf
http://www.stephankinsella.com/wp-content/uploads/2009/10/HaydenToJackson.pdf
