Hi Meow,
I took a quick look at the paper and it appears to me that the best results were achieved with using a 12 - 14hz (which is SMR). While I don't know what program(s) they used, I can suggest a few programs of the Proteus, that focuses on this range, to try. You could try: P 6 - Peak Composure or P21 - Creativity enhancement.
You could also try a program I wrote, which focuses on a similar range of frequencies - See attached. I mostly use this program with just the sound however you can use it the traditional way or with just the sound while you are studying.
I'll also let you know what I hear from Robert.
M.
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