diff --git a/static/pdf/tikhomirov/2023/2023_23-EJP919.pdf b/static/pdf/tikhomirov/2023/2023_23-EJP919.pdf new file mode 100644 index 0000000..1c1f475 Binary files /dev/null and b/static/pdf/tikhomirov/2023/2023_23-EJP919.pdf differ diff --git a/static/pdf/tikhomirov/2023/2023_mathematics-11-00764.pdf b/static/pdf/tikhomirov/2023/2023_mathematics-11-00764.pdf new file mode 100644 index 0000000..1683ef6 Binary files /dev/null and b/static/pdf/tikhomirov/2023/2023_mathematics-11-00764.pdf differ