However, it is becoming increasingly common to play at 40 points. See Algarin, M. A., Ruiz, R. & Vazquez, B. (2010), Locos por el mus. Reglamento y manual para llegar a ser un campeón de mus (Crazy about Mus. Regulation and Manual to Become a Champion of Mus), Bubok Editorial. ISBN 978-84-614-2185-5