MathSciNet bibliographic data MR12634 10.0X Erdös, Paul Some remarks on Euler's $\phi$$\phi$-function and some related problems. Bull. Amer. Math. Soc. 51, (1945). 540–544. Article

For users without a MathSciNet license , Relay Station allows linking from MR numbers in online mathematical literature directly to electronic journals and original articles. Subscribers receive the added value of full MathSciNet reviews.