Another characterization of BMO

The following characterization of functions of bounded mean oscillation (BMO) is proved./is in BMO if and only if f=a\ogg* -/Slogh* + b where g*, (h*) is the Hardy-Littlewood maximal function of g, (h), respectively, b is bounded and ||/||Bmo < c(a + ß + \\b\\x).