Устройство свайных фундаментов [Электронный ресурс]: учебное пособие / Н.И. Ватин [и др.]; Санкт-Петербургский государственный политехнический университет. — Электрон. текстовые дан. (1 файл : 4,68 Мб). — Санкт-Петербург, 2012. — Загл. с титул. экрана. — Свободный доступ из сети Интернет (чтение, печать, копирование). — Текстовый документ. — Adobe Acrobat Reader 7.0. — <URL:http://elib.spbstu.ru/dl/2/3079.pdf>.
| Period | Read | Copy | Open | Total | ||
|---|---|---|---|---|---|---|
| Year 2013 | Quarter 2 | 15 | 0 | 10 | 0 | 25 |
| Quarter 3 | 17 | 0 | 6 | 0 | 23 | |
| Quarter 4 | 10 | 0 | 17 | 0 | 27 | |
| Year 2014 | Quarter 1 | 17 | 0 | 8 | 0 | 25 |
| Quarter 2 | 30 | 0 | 13 | 0 | 43 | |
| Quarter 3 | 25 | 0 | 12 | 0 | 37 | |
| Quarter 4 | 21 | 0 | 10 | 0 | 31 | |
| Year 2015 | Quarter 1 | 12 | 0 | 11 | 0 | 23 |
| Quarter 2 | 21 | 0 | 13 | 0 | 34 | |
| Quarter 3 | 12 | 0 | 8 | 0 | 20 | |
| Quarter 4 | 18 | 0 | 67 | 0 | 85 | |
| Year 2016 | Quarter 1 | 17 | 0 | 32 | 0 | 49 |
| Quarter 2 | 15 | 0 | 25 | 0 | 40 | |
| Quarter 3 | 13 | 0 | 121 | 0 | 134 | |
| Quarter 4 | 33 | 0 | 552 | 0 | 585 | |
| Year 2017 | Quarter 1 | 41 | 0 | 431 | 0 | 472 |
| Quarter 2 | 51 | 0 | 1,491 | 0 | 1,542 | |
| Quarter 3 | 44 | 0 | 1,100 | 0 | 1,144 | |
| Quarter 4 | 44 | 0 | 1,350 | 0 | 1,394 | |
| Year 2018 | Quarter 1 | 85 | 0 | 1,813 | 0 | 1,898 |
| Quarter 2 | 56 | 0 | 2,860 | 0 | 2,916 | |
| Quarter 3 | 85 | 0 | 1,814 | 0 | 1,899 | |
| Quarter 4 | 30 | 0 | 1,192 | 0 | 1,222 | |
| Year 2019 | Quarter 1 | 27 | 0 | 1,180 | 0 | 1,207 |
| Quarter 2 | 27 | 0 | 1,538 | 0 | 1,565 | |
| Quarter 3 | 33 | 0 | 1,330 | 0 | 1,363 | |
| Quarter 4 | 24 | 0 | 2,588 | 0 | 2,612 | |
| Year 2020 | Quarter 1 | 25 | 0 | 77 | 0 | 102 |
| Quarter 2 | 40 | 0 | 3 | 0 | 43 | |
| Quarter 3 | 25 | 0 | 0 | 0 | 25 | |
| Quarter 4 | 28 | 0 | 301 | 0 | 329 | |
| Year 2021 | Quarter 1 | 27 | 0 | 1,473 | 0 | 1,500 |
| Quarter 2 | 29 | 0 | 1,664 | 0 | 1,693 | |
| Quarter 3 | 26 | 0 | 1,615 | 0 | 1,641 | |
| Quarter 4 | 23 | 0 | 2,013 | 0 | 2,036 | |
| Year 2022 | Quarter 1 | 24 | 0 | 1,940 | 0 | 1,964 |
| Quarter 2 | 29 | 0 | 3,605 | 0 | 3,634 | |
| Quarter 3 | 85 | 0 | 4,231 | 0 | 4,316 | |
| Quarter 4 | 57 | 0 | 3,846 | 0 | 3,903 | |
| Year 2023 | Quarter 1 | 26 | 0 | 4,489 | 0 | 4,515 |
| Quarter 2 | 48 | 1 | 5,115 | 0 | 5,164 | |
| Quarter 3 | 41 | 0 | 3,748 | 0 | 3,789 | |
| Quarter 4 | 47 | 0 | 4,936 | 0 | 4,983 | |
| Year 2024 | Quarter 1 | 64 | 0 | 4,486 | 0 | 4,550 |
| Quarter 2 | 92 | 0 | 4,824 | 0 | 4,916 | |
| Quarter 3 | 58 | 0 | 2,497 | 0 | 2,555 | |
| Quarter 4 | 158 | 0 | 3,190 | 0 | 3,348 | |
| Year 2025 | Quarter 1 | 72 | 0 | 2,981 | 0 | 3,053 |
| Quarter 2 | 138 | 2 | 3,125 | 0 | 3,265 | |
| Quarter 3 | 24 | 0 | 279 | 0 | 303 | |
| Total | 2,009 | 3 | 80,030 | 0 | 82,042 | |