Grzelak, M., Cika, N., & Roszko-Wójtowicz, E. (2017). INNOVATION ACTIVITIES OF INDUSTRIAL ENTERPRISES IN POLAND IN THE LIGHT OF PUBLIC STATISTICS. Acta Scientiarum Polonorum. Oeconomia, 16(4), 61–70. https://doi.org/10.22630/ASPE.2017.16.4.45