y of sample sizes to be sampled for each panel
  and each sampling occasion.</p>
    </div>
    <div id="details">
    <h2>Details</h2>
    <p>The function uses <code>find.BIB</code> function from crossdes package to
search for a D-optimal block design.  crossdes uses package AlgDesign
to search balanced incomplete block designs.</p>
    </div>
    <div id="references">
    <h2>References</h2>
    <p>Cook R. D.  and C. Nachtsheim. (1989). Computer-aided blocking of factorial
  and response-surface designs. 