Pinkovetskaia, I. S., I. V. Balynin, and N. V. Berezina. “Assessment of Specialization of Early Stage Entrepreneurs in Different Countries in 2018”. Amazonia Investiga, vol. 8, no. 22, Sept. 2019, pp. 69-75, https://amazoniainvestiga.info/index.php/amazonia/article/view/29.