O. V. Kalinkevich, L. Angelova, A. Daskalova, S. N. Danilchenko, A. N. Kalinkevich, A. G. Ponomarev, V. A. Baturin, A. Yu. Karpenko, Ye. I. Zinchenko, S. V. Kolinko, H. Ye. Polozhii, and I. Buchvarov, Controllable structures on the surface of natural polymers made by proton beam writing and femtosecond laser treatment, Low Temp. Phys. 48, (2022) [Fiz. Nyzk. Temp. 48, 393-397, (2022)] DOI: https://doi.org/10.1063/10.0009742.