References for other algorithms and techniques used in FET:

• Generating a random permutation of a vector in linear time (used to shuffle the order of time slots at which an activity can be placed): Thomas H. Cormen, Charles E. Leiserson and Ronald R. Rivest - Introduction to Algorithms - first edition (in Romanian), Section 8.3, Exercise 8.3-4.
• Obsolete - it was replaced in FET version 5.44.0: 32 bit random number generator: Donald E. Knuth - The Art of Computer Programming - Volume 2 - Seminumerical Algorithms, Third Edition (in Romanian), Section 3.6.
• The 32 bit random number generator named MRG32k3a:
  P. L'Ecuyer, ``Good Parameter Sets for Combined Multiple Recursive Random Number Generators'', Shorter version in Operations Research, 47, 1 (1999), 159--164.
  http://pubsonline.informs.org/doi/abs/10.1287/opre.47.1.159
  Includes ideas and code from the files: http://simul.iro.umontreal.ca/rng/MRG32k3a.h, http://simul.iro.umontreal.ca/rng/MRG32k3a.c, and/or https://www.iro.umontreal.ca/~lecuyer/myftp/papers/combmrg2.c.
  Used with permission from the author, Pierre L'Ecuyer (9 March 2020).
• For the virtual rooms allocation function we used an algorithm for a randomized maximum bipartite matching of minimum cost, inspired and modified from the Hopcroft-Karp algorithm, which was described and implemented in pseudocode on the Wikipedia internet page: https://en.wikipedia.org/wiki/Hopcroft%E2%80%93Karp_algorithm.
• Qt Documentation:
  https://doc.qt.io/.
• A tutorial on pointers and arrays in C, by Ted Jensen, Chapter 9: Pointers and Dynamic Allocation of Memory:
  https://pdos.csail.mit.edu/6.828/2014/readings/pointers.pdf
  We used the idea of contiguous memory allocation into the dynamic array. We used the idea in the file src/engine/matrix.h.
• C++ FAQ LITE, by Marshall Cline, Section [13] - Operator overloading, Article [13.12]:
  http://parashift.com/c++-faq-lite/.
  We used the recommendation to add the () operator for a dynamically allocated matrix, which is not necessarily slower. We used the idea in the file src/engine/matrix.h.
• References for the Javascript code to highlight similar entries in the HTML timetables (FET code by Volker Dirr) can be found in Les Richardson's Open Admin for Schools:
  http://www.openadmin.ca/.
  
• https://www.qtcentre.org/threads/53066-QMap-sorting-according-to-QLocale.
• https://www.qtcentre.org/threads/57210-how-to-change-background-color-of-individual-QHeaderView-section.
• https://www.qtcentre.org/threads/46841-Can-t-style-QHeaderView-section-selected-in-QSS-stylesheet.
• https://stackoverflow.com/questions/15519749/how-to-get-widget-background-qcolor.
• https://stackoverflow.com/questions/22635867/is-it-possible-to-set-the-text-of-the-qtableview-corner-button.
• https://stackoverflow.com/questions/19555121/how-to-get-current-timestamp-in-milliseconds-since-1970-just-the-way-java-gets.
• https://stackoverflow.com/questions/31255486/c-how-do-i-convert-a-stdchronotime-point-to-long-and-back.
• https://stackoverflow.com/questions/18022927/convert-high-resolution-clock-time-into-an-integer-chrono/18023064.
• https://stackoverflow.com/questions/37767847/stdsort-function-with-custom-compare-function-results-error-reference-to-non.
• https://stackoverflow.com/questions/14416786/webpage-returning-http-406-error-only-when-connecting-from-qt.
• http://amin-ahmadi.com/2016/06/13/fix-modsecurity-issues-in-qt-network-module-download-functionality/.
• https://stackoverflow.com/questions/48093102/how-does-qt-select-a-default-style.
• https://stackoverflow.com/questions/3065438/switch-statement-with-returns-code-correctness.
• https://unix.stackexchange.com/questions/497526/linux-shell-script-run-a-program-only-if-it-exists-ignore-it-if-it-does-not-ex.
• OpenAI. ChatGPT. 2025.: https://chat.openai.com/.
• https://stackoverflow.com/questions/6736536/c-input-and-output-to-the-console-window-at-the-same-time.
• https://stackoverflow.com/questions/4184468/sleep-for-milliseconds.