02. Fricker S., Lebrun C., Hernandez Castañeda M., Paillé D., Heslouis M., Rousseau B., Jolivet V., Varilux® X Series™ Lenses - Extended Ranges Of Vision, Points de Vue, International Review of Ophthalmic Optics, www.pointsdevue.com, May 2017

02. Fricker S., Lebrun C., Hernandez Castañeda M., Paillé D., Heslouis M., Rousseau B., Jolivet V., Varilux® X Series™ Lenses - Extended Ranges Of Vision, Points de Vue, International Review of Ophthalmic Optics, www.pointsdevue.com, May 2017