The brochure by the Competence Initiative for the Protection of Humanity, Environment, and Democracy is not a scientific paper, it is a position statement.
The idea that cellular and wifi (etc) signals have negative effects on bees was promoted initially by the UK Independent as a misreporting of a study conducted in 2006 by the University of Landau, in which cordless (not mobile, mind) phone base stations were placed inside beehives and left running. After a week and a half of this, the bee colonies populations began to fall (although the study notes that several control colonies also experienced losses at the same time).
Other studies have been done since, but all require the EMF-emitting devices to be installed in the hives themselves and made to run continuously for days before the bees began to express clear displeasure with the arrangement (I tend to think they were simply annoyed by all the telemarketing calls).
Unless you keep your cell phone inside your beehive, it doesn't actually seem like there's much to worry about from EMR.
Talking to a local a few months back they knew a local beekeeper who lost all his hives after a phone tower got installed about 100 meters away,(he blames the tower) My mind is open on the possible effects but i don't trust politicians and industry bodies to tell me the whole truth about things, sometimes the truth lies somewhere in the middle.