TY - CPAPER AU - L. Sulkowski AU - J. Sulkowska TI - POLAND MEDICAL ENTREPRENEURSHIP – CONCEPTS, MODELS AND CLASSIFICATIONS T2 - 4th International Multidisciplinary Scientific Conference on Social Sciences and Arts SGEM 2017 PY - 2017 SP - 749 EP - 756 DO - 10.5593/sgemsocial2017/15/S05.094 PB - STEF92 Technology ER -