Klen, Riku <br/><br/>
On hyperbolic type metrics / 
Riku Klen. 
 - Helsinki :  Suomalainen Tiedeakatemia,  2009. 
 - 49 p. :  ill., figs.. 
 - Annales Academiae Scientiarum Fennicae. Mathematica. Dissertationes  No. 152  1239-6303 .
<br/><br/>Includes bibliogr. references : (p. 48-49) 
<br/><br/><label>ISBN: </label>9514109902 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mathematics<br/>Geometry<br/>Geometry, Hyperbolic