Articles on exploiration strategies

Hello...

I'm looking for articles on exploiration strategies. It may sound a bit
vague, but i'll try to describe what I'm looking for...

If a region would be splitted in different areas (by a grid) and you'd have
a global idea of how the area looks like, how could one distribute the
budget for exploration over the different areas (based on the rough image of
the different areas).

I already found one: Optimal exploiration strategies; the synthesis of
resource assessments and operation research. (M.J. Shulman), but I would
like to compare it with other articles. Since I'm a student in mining
engineering (TU Delft, Netherlands) I'm mostly interested in mineral-related
papers.

Does anyone have any ideas? Articles, URLs, books, everything is welcome!

Maarten