Hybrid materials with continuous mechanical property gradients that can be 3D printed oleh Gloria Young, Francesca Tallia, Jeffrey N. Clark, Manishankar Chellappan, Oriol Gavalda-Diaz, Enric Juan Alcocer, Silvia A. Ferreira, Sara M. Rankin, Joshua P. Clark, John V. Hanna, Jonathan R.T. Jeffers, Julian R. Jones