MathSciNet bibliographic data MR502900 47A50 (47A10) Fialkow, L. A note on the operator $X\rightarrow AX-XB$$X\rightarrow AX-XB$. Trans. Amer. Math. Soc. 243 (1978), 147–168. 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.