Чепарухин, Владимир Викторович. С. Ю. Витте - "инициатор создания и с Высочайшего соизволения устроитель" Санкт-Петербурского политехнического института [Электронный ресурс] / В. В. Чепарухин. — Электрон. текстовые дан. (1 файл : 1,65 Мб) // Научно-технические ведомости СПбГПУ. – Санкт-Петербург. – 2005. – Загл. с титул. экрана. — Электрон. версия печ. публикации 2005 г. — Доступ по паролю из сети Интернет (чтение). — Adobe Acrobat Reader 6.0. — <URL:http://elib.spbstu.ru/dl/1097.pdf>.
| Period | Read | Copy | Open | Total | ||
|---|---|---|---|---|---|---|
| Year 2013 | Quarter 2 | 32 | 0 | 5 | 0 | 37 |
| Quarter 3 | 15 | 0 | 9 | 0 | 24 | |
| Quarter 4 | 23 | 0 | 9 | 0 | 32 | |
| Year 2014 | Quarter 1 | 23 | 0 | 10 | 0 | 33 |
| Quarter 2 | 33 | 0 | 14 | 0 | 47 | |
| Quarter 3 | 26 | 0 | 14 | 0 | 40 | |
| Quarter 4 | 22 | 0 | 11 | 0 | 33 | |
| Year 2015 | Quarter 1 | 16 | 0 | 7 | 0 | 23 |
| Quarter 2 | 20 | 0 | 7 | 0 | 27 | |
| Quarter 3 | 22 | 0 | 11 | 0 | 33 | |
| Quarter 4 | 19 | 0 | 12 | 0 | 31 | |
| Year 2016 | Quarter 1 | 28 | 0 | 13 | 0 | 41 |
| Quarter 2 | 28 | 0 | 7 | 0 | 35 | |
| Quarter 3 | 18 | 0 | 7 | 0 | 25 | |
| Quarter 4 | 16 | 0 | 18 | 0 | 34 | |
| Year 2017 | Quarter 1 | 23 | 0 | 3 | 0 | 26 |
| Quarter 2 | 3 | 0 | 4 | 0 | 7 | |
| Quarter 3 | 10 | 0 | 5 | 0 | 15 | |
| Quarter 4 | 12 | 0 | 7 | 0 | 19 | |
| Year 2018 | Quarter 1 | 20 | 0 | 7 | 0 | 27 |
| Quarter 2 | 10 | 0 | 6 | 0 | 16 | |
| Quarter 3 | 12 | 0 | 5 | 0 | 17 | |
| Quarter 4 | 19 | 0 | 7 | 0 | 26 | |
| Year 2019 | Quarter 1 | 12 | 0 | 11 | 0 | 23 |
| Quarter 2 | 6 | 0 | 3 | 0 | 9 | |
| Quarter 3 | 9 | 0 | 6 | 0 | 15 | |
| Quarter 4 | 1 | 0 | 3 | 0 | 4 | |
| Year 2020 | Quarter 1 | 11 | 0 | 13 | 0 | 24 |
| Quarter 2 | 7 | 0 | 0 | 0 | 7 | |
| Quarter 3 | 10 | 0 | 0 | 0 | 10 | |
| Quarter 4 | 9 | 0 | 14 | 0 | 23 | |
| Year 2021 | Quarter 1 | 4 | 0 | 5 | 0 | 9 |
| Quarter 2 | 9 | 0 | 11 | 0 | 20 | |
| Quarter 3 | 7 | 0 | 8 | 0 | 15 | |
| Quarter 4 | 8 | 0 | 5 | 0 | 13 | |
| Year 2022 | Quarter 1 | 12 | 0 | 12 | 0 | 24 |
| Quarter 2 | 11 | 0 | 10 | 0 | 21 | |
| Quarter 3 | 10 | 0 | 11 | 0 | 21 | |
| Quarter 4 | 15 | 0 | 16 | 0 | 31 | |
| Year 2023 | Quarter 1 | 5 | 0 | 12 | 0 | 17 |
| Quarter 2 | 11 | 1 | 14 | 0 | 26 | |
| Quarter 3 | 9 | 0 | 13 | 0 | 22 | |
| Quarter 4 | 15 | 0 | 16 | 0 | 31 | |
| Year 2024 | Quarter 1 | 15 | 0 | 25 | 0 | 40 |
| Quarter 2 | 33 | 0 | 28 | 0 | 61 | |
| Quarter 3 | 17 | 0 | 11 | 0 | 28 | |
| Total | 696 | 1 | 445 | 0 | 1,142 | |