https://forum.defence-force.org/viewtopic.php?p=26018#p26018
https://forum.defence-force.org/download/file.php?id=2898
https://forum.defence-force.org/viewtopic.php?f=5&t=2320
https://forum.defence-force.org/download/file.php?id=2892
Sprites 01 https://forum.zdoom.org/viewtopic.php?f=19&t=52873&start=180#p943652 https://i.imgur.com/yDTO1HF.png
Sprites 02 https://www.spriters-resource.com/fullview/27846/ https://www.spriters-resource.com/resources/sheets/25/27846.png?updated=1460955811
Sprites 03 https://forum.zdoom.org/viewtopic.php?t=48738 https://i.imgur.com/xHuJa69.png
http://www.geocities.ws/TimesSquare/Castle/3573/w3d_mus.html