Simon Admiraal: The Figure Behind the Establishment of Art Education at ITB, M. Armando Siahaan, FSRD-ITB, 18.Aug.2017 (Bahasa Indonesia)[4]Archived 2021-11-06 at the Wayback Machine
Abstract Artists Showcase Work at National Gallery Exhibition, Keeping Movement Alive. Dhania Saratika, 30.October 2017, Jakarta Globe. [5]Archived 2022-04-08 at the Wayback Machine
Artists and the Roelofs couple (in Dutch). Jan. 2011 in The Commandery Gemert[1]Archived 2023-03-26 at the Wayback Machine
The Journey of Indonesian Painting: The Bentara Budaya Collection, 2008, p 71. [2]Archived 2021-11-08 at the Wayback Machine
Simon Admiraal: The Figure Behind the Establishment of Art Education at ITB, M. Armando Siahaan, FSRD-ITB, 18.Aug.2017 (Bahasa Indonesia)[4]Archived 2021-11-06 at the Wayback Machine
Abstract Artists Showcase Work at National Gallery Exhibition, Keeping Movement Alive. Dhania Saratika, 30.October 2017, Jakarta Globe. [5]Archived 2022-04-08 at the Wayback Machine