Племнек, Александр Иванович. Z39.50: Открытый доступ к библиографической информации [Электронный ресурс] / А.И. Племнек, Р.Т. Усманов. — Электрон. текстовые дан. (1 файл : 3.32 Мб) // Научные и технические библиотеки = Scientific and technical libraries = Naucnye i tekhnicheskie biblioteki: ежемесячный научно-практический журнал / Министерство образования и науки Российской Федерации; Государственная публичная научно-техническая библиотека России. – Москва. – 1998. – № 8. — С. 24-28. — Загл. с титул. экрана. — Электронная публикация 2002 г. — Свободный доступ из сети Интернет (чтение, печать, копирование). — Adobe Acrobat Reader 7.0. — <URL:http://elib.spbstu.ru/dl/2/0001251671pa.pdf>. — <URL:http://doi.org/10.18720/SPBPU/2/0001251671pa>.
| Period | Read | Copy | Open | Total | ||
|---|---|---|---|---|---|---|
| Year 2015 | Quarter 4 | 18 | 0 | 16 | 0 | 34 |
| Year 2016 | Quarter 1 | 12 | 0 | 12 | 0 | 24 |
| Quarter 2 | 8 | 0 | 5 | 0 | 13 | |
| Quarter 3 | 7 | 0 | 3 | 0 | 10 | |
| Quarter 4 | 6 | 0 | 10 | 0 | 16 | |
| Year 2017 | Quarter 1 | 8 | 0 | 9 | 0 | 17 |
| Quarter 2 | 5 | 0 | 3 | 0 | 8 | |
| Quarter 3 | 10 | 0 | 9 | 0 | 19 | |
| Quarter 4 | 7 | 0 | 7 | 0 | 14 | |
| Year 2018 | Quarter 1 | 8 | 0 | 8 | 0 | 16 |
| Quarter 2 | 5 | 0 | 11 | 0 | 16 | |
| Quarter 3 | 4 | 0 | 12 | 0 | 16 | |
| Quarter 4 | 8 | 0 | 12 | 0 | 20 | |
| Year 2019 | Quarter 1 | 1 | 0 | 6 | 0 | 7 |
| Quarter 2 | 4 | 0 | 6 | 0 | 10 | |
| Quarter 3 | 5 | 0 | 17 | 0 | 22 | |
| Quarter 4 | 3 | 0 | 14 | 0 | 17 | |
| Year 2020 | Quarter 1 | 5 | 0 | 23 | 0 | 28 |
| Quarter 2 | 6 | 0 | 0 | 0 | 6 | |
| Quarter 3 | 6 | 0 | 0 | 0 | 6 | |
| Quarter 4 | 5 | 0 | 8 | 0 | 13 | |
| Year 2021 | Quarter 1 | 5 | 0 | 6 | 0 | 11 |
| Quarter 2 | 2 | 0 | 6 | 0 | 8 | |
| Quarter 3 | 13 | 0 | 7 | 0 | 20 | |
| Quarter 4 | 2 | 0 | 7 | 0 | 9 | |
| Year 2022 | Quarter 1 | 6 | 0 | 9 | 0 | 15 |
| Quarter 2 | 3 | 0 | 4 | 0 | 7 | |
| Quarter 3 | 5 | 0 | 4 | 0 | 9 | |
| Quarter 4 | 10 | 0 | 7 | 0 | 17 | |
| Year 2023 | Quarter 1 | 9 | 0 | 14 | 0 | 23 |
| Quarter 2 | 9 | 0 | 6 | 0 | 15 | |
| Quarter 3 | 6 | 0 | 6 | 0 | 12 | |
| Quarter 4 | 9 | 0 | 9 | 0 | 18 | |
| Year 2024 | Quarter 1 | 3 | 0 | 9 | 0 | 12 |
| Quarter 2 | 12 | 0 | 29 | 0 | 41 | |
| Quarter 3 | 17 | 0 | 19 | 0 | 36 | |
| Quarter 4 | 17 | 0 | 12 | 0 | 29 | |
| Year 2025 | Quarter 1 | 14 | 0 | 31 | 0 | 45 |
| Quarter 2 | 18 | 0 | 16 | 0 | 34 | |
| Quarter 3 | 0 | 0 | 1 | 0 | 1 | |
| Total | 301 | 0 | 393 | 0 | 694 | |