A note on multiple Seshadri constants on surfaces
  We give a bound for the multiple Seshadri constants on surfaces with Picard number 1. The result is a natural extension of the bound of A. Steffens for simple Seshadri constants. In particular, we prove that the Seshadri constant $\epsilon(L; r)$ is maximal when $rL^2$ is a square. 
Luis Fuentes Garcia