Scintillators are able to resolve particle energy, and can be used to measure a spectrum. Muons have very high energy, which can be used to identify them.
For extra certainty, you can use two stacked scintillators and only count a signal if it occurs in both of them within nanoseconds. This also allows determining the rough direction the particle came from since a particle that comes in at a low angle will not hit both detectors. Changing the distance between the scintillators will change the solid angle the instrument can 'see'. (as given by 5 in your list)
This guide for a student experiment has more background than the paper you linked:
For extra certainty, you can use two stacked scintillators and only count a signal if it occurs in both of them within nanoseconds. This also allows determining the rough direction the particle came from since a particle that comes in at a low angle will not hit both detectors. Changing the distance between the scintillators will change the solid angle the instrument can 'see'. (as given by 5 in your list)
This guide for a student experiment has more background than the paper you linked:
http://home.fnal.gov/~group/WORK/muonDetection.pdf