The Brown Bee Network is a group of beekeepers and scientists that are interested in saving the Brown bees from extinction in the Nordic countries. The secretariat of the group is the Farm Animal section of the Nordic Genetic Resource Center (NordGen) The group initially compiled a report on the status of the Brown Bee in the Nordic and Baltic countries. This report, published in 2014, can be downloaded here. A year later the report was followed up by a Plan of Action for the conservation of the Nordic Brown bee. This wiki is a result of the Plan of Action.
Interest in the conservation of the brown bee is of course not limited to this group. There are in fact many local and international organisation across Europe with the same aim. You can find a list of links here. Also scientist are getting more an more involved and many scientific studies are being published about Apis mellifera mellifera. If you should find that you can not access some of the publications, try sending an email to first author of the study - they will surely be happy to send you a pdf of their article.