Using columns with special characters in formulae in R

This works:

dat <- data.frame(M=rnorm(10),'A/B'=1:10,check.names=F)

> lm(M~`A/B`,dat)

Call:
lm(formula = M ~ `A/B`, data = dat)

Coefficients:
(Intercept)        `A/B`  
    -1.0494       0.1214  

Joran's comment on my question is the answer - I didn't know of the existence of make.names()

Joran, if you reply as an answer I'll mark you as correct. Cheers!