@Article{ authors = " Jorge Lafuente, Raul Merinero, Victor Cardenes", title = "Study of efficiency : Standing work vs. ground-work in amateur MMA matches ", journal = "Ido Movement for Culture : journal of martial arts anthropology : theory of culture, psychophysical culture, cultural tourism, anthropology of martial arts, combat sports", issue = "2023 / Tom 23 / Numer 2", pages = "41 - 49" }