although is difficult to develop a method that is at the same time we believe that is required a comprehensive concept taking account of existing which be implemented in practice
Although it is difficult to develop a method that is coherent at the same time, we believe that what is required is a comprehensive concept, taking account of existing measures, which can be implemented in practice.
Although is difficult to develop a method that is at the same time, we believe that is required a comprehensive concept, taking account of existing which be implemented in practice.