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Publisher
- mdpi ag6
- university of szczecin4
- routledge3
- wydawnictwo sggw - warsaw university od life sciences press3
- isma syc int2
- multidisciplinary digital publishing institute2
- university of piraeus. international strategic management association2
- agh university of science and technology press1
- akademia nauk stosowanych wsge im. a. de gasperi w jozefowie1