Tentoonstellingen – Expositions
2019 29/05 – 02/06 STOCKHOLMIA Palmarès
2019 11/06 – 17/06 WUHAN 2019
2019 31/07 – 04/08 SINGAPORE 2019
2019 24/10-26/10 SINDELFINGEN POSTGESCHICHTE LIVE
2019 27/11 – 30/11 MONACOPHIL 2019
2020 19/03 – 21/03 HERTOGPOST 2020 
2020 02/05 – 09/05 LONDON 2020
2020 28/08 – 30/08 ANVERS 2020
2021 19/11 – 22/11 ATHENE 2021
Archieven – Archives
Bibliotheken – Bibliothèques
- American Philatelic Research Library APRL
Websites – Site Web
- Gekaapte brieven http://www.gekaaptebrieven.nl
Tijdschriften – Magazines
- Belgaphil FRCPB Belgaphil
- Les Congolâtres CONGOLATRES
- Le Maghrebophila MAGHREBOPHILA
Verenigingen – Sociétés
- American Philatelic Society APS
- Académie de France AdF
- Académie Européenne de Filatélie AEP
- Belgian Philatelic Study Circle GB BSC
- Federation of European Philatelic Associations FEPA
- Fédération Internationale de Filatélie FIP
- Royal Philatelic Society London RPSL
- US Classic Society USPCS