The current Matlab version is 2013a:
/reg/common/package/matlab/r2013a/bin/matlab
You can find which nodes in the pool have a Matlab license available by running the following command:
/reg/common/package/scripts/matlic
You can find who is using the Matlab licenses, and for how long, by running the following command:
/reg/common/package/scripts/matlic --show-users