Agnieszka Janik. THE ANALYSIS OF EXISTING INDICATORS, METHODS AND TOOLS FOR MEASURING CIRCULARITY IN THE CONTEXT OF THEIR FUTURE DEVELOPMENT. SGEM International Multidisciplinary Scientific GeoConference EXPO Proceedings; SGEM2017 17th International Multidisciplinary Scientific GeoConference, 2017, pp. 43-50. https://doi.org/10.5593/sgem2017/53/s21.006