User-agent: psbot
Disallow: /

User-agent: Yandex
User-agent: StackRambler
User-agent: Aport
Disallow: /en/
Disallow: /search/
Disallow: /cgi-bin/

User-agent: *
Disallow: /theses/filter/
Disallow: /ru/theses/filter/
Disallow: /en/theses/filter/
Disallow: /stats/
Disallow: /ru/stats/
Disallow: /en/stats/
Disallow: /*?