Logical entropy on effect algebras with the Riesz decomposition property Zahra Eslami Giski, Abolfazl Ebrahimzadeh and Dagmar Markechová Eur. Phys. J. Plus, 133 7 (2018) 286 Published online: 30 July 2018 DOI: 10.1140/epjp/i2018-12107-x