Петрова, Наталия Владимировна. — Нормальные системы линейных дифференциальных уравнений с постоянными вещественными коэффициентами (СЛДУ): учебное пособие / Петрова Н. В., Ульянова Н. С.; Санкт-Петербургский политехнический университет Петра Великого. — Санкт-Петербург, 2021. — 1 файл (1,31 Мб). — Загл. с титул. экрана. — Свободный доступ из сети Интернет (чтение, печать). — <URL:https://elib.spbstu.ru/dl/5/tr/2021/tr21-92.pdf>. — DOI 10.18720/SPBPU/5/tr21-92. — Текст: электронный
| Period | Read | Copy | Open | Total | |||
|---|---|---|---|---|---|---|---|
| Year 2021 | Quarter 2 | April | 4 | 0 | 0 | 0 | 4 |
| May | 4 | 0 | 0 | 0 | 4 | ||
| June | 3 | 0 | 0 | 0 | 3 | ||
| Quarter 3 | July | 0 | 0 | 0 | 0 | 0 | |
| August | 4 | 0 | 0 | 0 | 4 | ||
| September | 2 | 0 | 0 | 0 | 2 | ||
| Quarter 4 | October | 1 | 0 | 0 | 0 | 1 | |
| November | 2 | 0 | 0 | 0 | 2 | ||
| December | 4 | 0 | 0 | 0 | 4 | ||
| Year 2022 | Quarter 1 | January | 1 | 0 | 0 | 0 | 1 |
| February | 3 | 0 | 0 | 0 | 3 | ||
| March | 4 | 0 | 0 | 0 | 4 | ||
| Quarter 2 | April | 1 | 0 | 0 | 0 | 1 | |
| May | 8 | 1 | 0 | 0 | 9 | ||
| June | 2 | 0 | 0 | 0 | 2 | ||
| Quarter 3 | July | 6 | 0 | 0 | 0 | 6 | |
| August | 3 | 0 | 0 | 0 | 3 | ||
| September | 4 | 0 | 0 | 0 | 4 | ||
| Quarter 4 | October | 1 | 0 | 0 | 0 | 1 | |
| November | 5 | 0 | 0 | 0 | 5 | ||
| December | 5 | 0 | 0 | 0 | 5 | ||
| Year 2023 | Quarter 1 | January | 4 | 0 | 0 | 0 | 4 |
| February | 2 | 0 | 0 | 0 | 2 | ||
| March | 1 | 0 | 0 | 0 | 1 | ||
| Quarter 2 | April | 2 | 0 | 0 | 0 | 2 | |
| May | 14 | 0 | 0 | 0 | 14 | ||
| June | 34 | 0 | 0 | 0 | 34 | ||
| Quarter 3 | July | 15 | 1 | 0 | 0 | 16 | |
| August | 3 | 0 | 0 | 0 | 3 | ||
| September | 6 | 0 | 0 | 0 | 6 | ||
| Quarter 4 | October | 118 | 1 | 0 | 0 | 119 | |
| November | 248 | 2 | 0 | 0 | 250 | ||
| December | 24 | 0 | 0 | 0 | 24 | ||
| Year 2024 | Quarter 1 | January | 8 | 0 | 0 | 0 | 8 |
| February | 5 | 0 | 0 | 0 | 5 | ||
| March | 18 | 1 | 0 | 0 | 19 | ||
| Quarter 2 | April | 28 | 1 | 0 | 0 | 29 | |
| May | 20 | 0 | 0 | 0 | 20 | ||
| June | 18 | 0 | 0 | 0 | 18 | ||
| Quarter 3 | July | 11 | 0 | 0 | 0 | 11 | |
| August | 9 | 0 | 0 | 0 | 9 | ||
| September | 19 | 0 | 0 | 0 | 19 | ||
| Quarter 4 | October | 66 | 3 | 0 | 0 | 69 | |
| November | 437 | 2 | 0 | 0 | 439 | ||
| December | 39 | 0 | 0 | 0 | 39 | ||
| Year 2025 | Quarter 1 | January | 18 | 0 | 0 | 0 | 18 |
| February | 0 | 0 | 0 | 0 | 0 | ||
| Total | 1,234 | 12 | 0 | 0 | 1,246 | ||