ROBLES, Gemma, MÉNDEZ, José M. and SALTO, Francisco. A modal restriction of R-Mingle with the variable-sharing property. Logic and Logical Philosophy. Online. 30 December 2010. Vol. 19, no. 4, pp. 341-351. [Accessed 28 April 2025]. DOI 10.12775/LLP.2010.013.