Samenvatting
Following the first publications on the BREVER-law in October, 1977 several comments were made. Further research into this matter has also been carried out. The author deals with the various studies which are related to this subject. He also summarizes the various comments from Dutch experts and in turn makes his reply to them. The article concludes with yet another explanation of the theory on the issues concerned and with a call for more comments and further research.