Mass of the Up Quark

My friend Arnulfo Zepeda published a Physical Review Letters article many years ago:

 Phys. Rev. Lett. 41, 139 - 141 (1978)

Now my friend Robert L. Sugar publishes the latest lattice calculation:

MILC results for light pseudoscalars

After so many years the works of these two friends meet. I just regret not having collaborated with both, to follow my ideas, that so far hadn't produced nothing of value.

So it goes.