Not working anymore! I've tried to check internal name of the field with space using Get Rows. The source was an Excel table. This what I've got:
...
"Calculated SD": "44107",
"Calculated ED": "44134",
...
I'm done with ODATA filtering. It is so unusable. I've tried it several times and each of theme it was a nightmare.
If you can stay away from using ODATA filtering as long as you have other options!