- Carmichael, Robert Daniel,
*Who was Who in America***VI**(Marquis, 1969).

- H T Davis, Review: The Logic of Discovery by R D Carmichael,
*Isis***15**(2) (1931), 373-376.

- L W Griffiths, Review: Introduction to the Theory of Groups of Finite Order by Robert D Carmichael,
*National Mathematics Magazine***13**(7) (1939), 353-354.

- R A J, Review: Mathematical Tables and Formulas by Robert D Carmichael and Edwin R Smith,
*Amer. Math. Monthly***39**(1) (1932), 41.

- F W Perkins, Review: The Logic of Discovery by R D Carmichael,
*Amer. Math. Monthly***38**(8) (1931), 458-460.

- A Schlafly and S Wagon, Carmichael's Conjecture on the Euler Function is Valid Below 10
^{{10,000,000},}*Math. Comp.***63**(207) (1994), 415-419.

- S Wagon, Carmichael's 'empirical theorem',
*Math. Intelligencer***8**(2) (1986), 61-63.

- W Weaver, Review: A Debate on the Theory of Relativity by R D Carmichael, W D MacMillan, M E Hufford and H T Davis,
*Amer. Math. Monthly***36**(1) (1929), 38-42.