https://www.youtube.com/channel/UCMrvLMUITAImCHMOhX88PYQ Piximperfect channel on youtube
- https://www.exploringexposure.com/blog/post-processing/in-defense-of-post-processing/
- https://www.kenrockwell.com/tech/ps-contrast.htm
- https://www.kenrockwell.com/tech.htm
- DOI10.1016/j.conb.2007.07.01
- https://www.photopos.com/PPP3_BS/Photo-Pos-Pro-Free-Photo-Editor.aspx