| title | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|
| Mathematics is About the World: How Ayn Rand's Theory of Concepts Unlocks the False Alternatives Between Plato's Mathematical Universe and Hilbert's Game of Symbols | 978-1-5OO5-5197-1 (1-5OO5-5197-X) | 2014 |
"E. K." · R. E. · R.K. · Robert E. · Robert K. · Robert Knapp