Dear colleagues and friends, This is just to wish you a MERRY CHRISTMAS and that 2019 brings to our world the so needed PECE and PROSPERITY. Best regards Ramon -- ======================================================== Ramon Puigjaner Catedràtic emèrit de la Universitat de les Illes Balears Lluís Companys 7, 3-1 08530 LA GARRIGA (Catalonia) Phone: +34-937321064 Mob: +34-630064146 e-mail: putxi@uib.cat ========================================================