<html><head><title>XGAP : a GAP 4 package - References</title></head>
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<h1>X<font face="Gill Sans,Helvetica,Arial">GAP</font> : a GAP 4 package - References</h1><dl>
<dt><a name="Cav86"><b>[Cav86]</b></a><dd>
Alberto Cavicchioli.
<br> A countable class of non-homeomorphic homology spheres with Heegaard
genus two.
<br> <em>Geom. Dedicata</em>, 20:345--348, 1986.
<dt><a name="FJ65"><b>[FJ65]</b></a><dd>
K. Ferber and H. Jürgensen.
<br> A Programme for Drawing a Lattice.
<br> In J. Leech, editor, <em>Computational Problems in Abstract
Algebra</em>, pages 83--86, 1970.
<dt><a name="HR91"><b>[HR91]</b></a><dd>
Derek F. Holt and Sarah Rees.
<br> A Graphics System for Displaying Finite Quotients of Finitely
Presented Groups.
<br> In L. Finkelstein and W. M. Kantor, editors, <em>Groups and
Computation</em>, pages 113--126, 1991.
<dt><a name="SK95"><b>[SK95]</b></a><dd>
Susanne Keitemeier.
<br> Graphische Darstellung von Untergruppendiagrammen im
Computeralgebraprogramm <font face="Gill Sans,Helvetica,Arial">GAP</font>.
<br> Diplomarbeit, Lehrstuhl D für Mathematik, Rheinisch Westfälische
Technische Hochschule, Aachen, Germany, 1995.