Doctoral studies are the first stage of an academic career, which applies to both the academic doctoral study programme and the professional doctoral programme. Over the past two decades, the role and tasks of doctoral studies have changed dramatically, especially in Europe. Doctoral studies have become an important link between the European Higher Education Area and the European Research Area and its main task is to provide those with doctoral degrees with the best qualifications for the creation, implementation and diffusion of new knowledge and innovations. Interdisciplinarity is trending. Nowadays scientists, researchers, professionals face up with the global problems. This global problem usually is unsolvable and complex by individual ...