for the sake of completeness, both are good reads https://homepages.cwi.nl/~storm/teaching/reader/Dijkstra68.pdf https://homepages.cwi.nl/~storm/teaching/reade

for the sake of completeness, both are good reads https://homepages.cwi.nl/~storm/teaching/reader/Dijkstra68.pdf https://homepages.cwi.nl/~storm/teaching/reader/Dijkstra68.p... https://www.maths.ed.ac.uk/~v1ranick/papers/wigner.pdf https://www.maths.ed.ac.uk/~v1ranick/papers/wigner.pdf