Ari Muhonen
: On development of the FIP literature class judging in: The Philatelic Journalist Number 170 February 2023 The Philatelic Journal of the Association Internationale des Journalistes Philatéliques Schwalmtal 2023
Georg Gärtner
: Stamp emission flood, the decline of stamp collecting and future prospects in: The Philatelic Journalist Number 170 February 2023 The Philatelic Journal of the Association Internationale des Journalistes Philatéliques Schwalmtal 2023