Лапшин, Кирилл Леонидович. Теория турбомашин [Электронный ресурс]: конспект лекций / К. Л. Лапшин; Санкт-Петербургский политехнический университет Петра Великого. — Электрон. текстовые дан. (1 файл : 2,76 МБ). — Санкт-Петербург, 2016. — Загл. с титул. экрана. — Свободный доступ из сети Интернет (чтение, печать, копирование). — Текстовый файл. — Adobe Acrobat Reader 7.0. — <URL:http://elib.spbstu.ru/dl/2/s16-186.pdf>. — <URL:http://doi.org/10.18720/SPBPU/2/s16-186>.
| Period | Read | Copy | Open | Total | ||
|---|---|---|---|---|---|---|
| Year 2016 | Quarter 4 | 22 | 0 | 77 | 0 | 99 |
| Year 2017 | Quarter 1 | 15 | 0 | 88 | 0 | 103 |
| Quarter 2 | 12 | 0 | 153 | 0 | 165 | |
| Quarter 3 | 10 | 0 | 130 | 0 | 140 | |
| Quarter 4 | 21 | 0 | 156 | 0 | 177 | |
| Year 2018 | Quarter 1 | 28 | 0 | 269 | 0 | 297 |
| Quarter 2 | 25 | 0 | 233 | 0 | 258 | |
| Quarter 3 | 26 | 0 | 200 | 0 | 226 | |
| Quarter 4 | 23 | 0 | 237 | 0 | 260 | |
| Year 2019 | Quarter 1 | 23 | 0 | 137 | 0 | 160 |
| Quarter 2 | 34 | 0 | 225 | 0 | 259 | |
| Quarter 3 | 27 | 0 | 197 | 0 | 224 | |
| Quarter 4 | 25 | 0 | 310 | 0 | 335 | |
| Year 2020 | Quarter 1 | 44 | 1 | 78 | 0 | 123 |
| Quarter 2 | 88 | 1 | 26 | 0 | 115 | |
| Quarter 3 | 67 | 0 | 4 | 0 | 71 | |
| Quarter 4 | 78 | 1 | 159 | 0 | 238 | |
| Year 2021 | Quarter 1 | 73 | 0 | 528 | 0 | 601 |
| Quarter 2 | 69 | 0 | 677 | 0 | 746 | |
| Quarter 3 | 58 | 0 | 259 | 0 | 317 | |
| Quarter 4 | 64 | 0 | 478 | 0 | 542 | |
| Year 2022 | Quarter 1 | 61 | 1 | 478 | 0 | 540 |
| Quarter 2 | 79 | 0 | 628 | 0 | 707 | |
| Quarter 3 | 71 | 0 | 293 | 0 | 364 | |
| Quarter 4 | 130 | 0 | 592 | 0 | 722 | |
| Year 2023 | Quarter 1 | 58 | 0 | 443 | 0 | 501 |
| Quarter 2 | 61 | 2 | 291 | 0 | 354 | |
| Quarter 3 | 34 | 0 | 186 | 0 | 220 | |
| Quarter 4 | 73 | 0 | 412 | 0 | 485 | |
| Year 2024 | Quarter 1 | 84 | 0 | 356 | 0 | 440 |
| Quarter 2 | 101 | 2 | 486 | 0 | 589 | |
| Quarter 3 | 57 | 0 | 181 | 0 | 238 | |
| Quarter 4 | 142 | 1 | 271 | 0 | 414 | |
| Year 2025 | Quarter 1 | 162 | 0 | 351 | 0 | 513 |
| Quarter 2 | 138 | 0 | 353 | 0 | 491 | |
| Quarter 3 | 1 | 0 | 35 | 0 | 36 | |
| Total | 2,084 | 9 | 9,977 | 0 | 12,070 | |