Juan's paper is titled: "New insights in catalyst deactivation and product distribution of zeolites in the Methanol-To-Hydrocarbons (MTH) reaction with methanol and dimethyl ether feeds", and it can be found here.
Dani's paper is called "Structure–deactivation relationships in zeolites during the methanol–to-hydrocarbon reaction: complementary assessments of the coke content", and will appear in Journal of Catalysis shortly.