Influence of light-polymerizing units and zirconia on the physical, chemical and biological properties of self-adhesive resin cements oleh Siriwong Wongsirisuwan, Narin Intarak, Sasiprapa Prommanee, Noppadol Sa-Ard-Iam, Sunporn Namano, Dusit Nantanapiboon, Thantrira Porntaveetus