Photographs shown on this website have either been purchased, or have obtained formal approval for publication, or are provided with source reference:
- Photo Thijs Aarten by ‘Peter van Breukelen Fotografie’
- Photos purchased from third parties - e.g. istockphoto.com
- The logo from the Knowledge platform NKL, on the 'Energy Portfolio' page, is and remains property of NKL.
Articles featuring Thijs Aarten, for example, have been referred to via external links, hence clearly mentioning reference.
Other information obtained from third parties will always contain the appropriate reference.