Holographic multi-focus 3D two-photon polymerization with real-time calculated holograms Vizsnyiczai, Gaszton ; Kelemen, Lóránd ; Ormos, Pál Abstract Publication: Optics Express Pub Date: October 2014 DOI: 10.1364/OE.22.024217 Bibcode: 2014OExpr..2224217V