Kiseleva OV, Lebedev AV, Pinkovetskaia IS, Rojas-Bahamón MJ, Arbeláez Campillo DF. Specialization and concentration of small and medium enterprises employees: Russian data. AmazInv [Internet]. 2019 Jun. 25 [cited 2025 Sep. 15];8(20):6-15. Available from: https://mail.amazoniainvestiga.info/index.php/amazonia/article/view/59