A good start for 2013: ZIME/SOL crew & CT in Torino + v3rbo + REKM + DrypNZ + Wood.
The history of graffiti on trains in Madrid.What does graffiti have to do with hip hop? and a few other good articles at urbanario.es.
Colors, shapes and technical: 5 pieces by Tacos (Vitry/Paris) [via]
Ironic messages by IMA from Saint Petersburg + great colors from el Norteno, Buytronick, Stinkfish, Poeta and Giulio Vesprini.