1. Abreu M, Siqueira A, Cardoso C, Caiaffa W (2008) Ordinal logistic regression models: application in quality-of-life studies. Cad Saude Pub 24:s581–s591. https://doi.org/10.1590/s0102-311x2008001600010
2. Adelman MA (1955) Concept and statistical measurement of vertical integration. In: Bureau UN (ed) Business concentration and price policy. Princeton University Press, Princeton, pp 279–328
3. Alijošiutė A, de Graaf P, Toennesen C, Matolay R, Dymowski J, Kissa M (2010) CSR self-assessment handbook for companies. UAB. https://www.spcc.pl/images/file/forums_workhops/csr_self_assesment_undp.pdf. Accessed 20 Oct 2021
4. Álvarez Jaramillo J, Zartha Sossa JW, Orozco Mendoza GL (2019) Barriers to sustainability for small and medium enterprises in the framework of sustainable development—literature review. Bus Strategy Environ 28:512–524. https://doi.org/10.1002/bse.2261
5. Barney J, Hesterly W (2019) Strategic management and competitive advantage: concepts and cases. Pearson Education Limited, Harlow