• Altof, Kristenenergiatehnoloogia instituut, insenerAt TalTech: 2021-https://orcid.org/0000-0003-1872-9329 https://www.webofscience.com/wos/author/rid/OVZ-6738-2025 https://www.scopus.com/authid/detail.uri?authorId=58813160000 https://taltech.ee/kontaktid/keskkonna-energia-ja-keemiatehnoloogia-uurimisruhm/kristen-altof
• Laboratory of environmental technology.
  Valorisation of environmental resources.
  Preis, Sergei https://taltech.ee/en/laboratory-environmental-technology