[3] S. W. Hell. Microscopy and its focal switch. Nat. Methods, 6, 24-32(2009).
[16] X. He et al. STED direct laser writing of 45 nm width nanowire. Micromachines, 10, 726(2019).
[31] S. K. Saha et al. Scalable submicrometer additive manufacturing. Science, 366, 105-109(2019).