2016 https://www.ideals.illinois.edu/bitstream/handle/2142/106650/Levinstein–Pragmatist%27s%20Guide%20Amended.pdf?sequence=2&isAllowed=y Academic paper
2016 https://www.ideals.illinois.edu/bitstream/handle/2142/106650/Levinstein–Pragmatist%27s%20Guide%20Amended.pdf?sequence=2&isAllowed=y Academic paper