1. Ahuja, M., Palmer, L., Mayne, D.C.: Problem 102. Coll. Math. J. 10, 129–130 (1979)
2. Akhlaghi, M.R.: Another proof of Young’s inequality for products. Am. Math. Mon. 120, 518 (2013)
3. Barnes, C.W.: Euler’s constant and e . $$\mathrm{e}.$$ Am. Math. Mon. 91, 428–430 (1984)
4. Beckenbach, E.F., Bellman, R.: Inequalities. Springer, Berlin (1965)
5. Beigel, R.: Rearranging terms in alternating series. Math. Mag. 54, 244–246 (1981)