complete stochastic description of internal targets effects on electron rings / M.Taiuti,V.Muccifora,C.Costa и др., 1991. - 21 p. - Текст : непосредственный.
Sustainability and competitiveness in the hospitality industry / [edited by] Vânia Costa, Carlos Costa., [2022]. - 6 с. - Текст : электронный.