Panayiotis Bilalis Leto-A. Tziveleka Spyridon Varlas Hermis Iatrou, pH-Sensitive nanogates based on poly(l-histidine) for controlled drug release from mesoporous silica nanoparticles, Polymer Chemistry, (7), 1475--1485, 2016, Royal Society of Chemistry (RSC), 1759-9954, 1759-9962