papers found in pdf1 or pdf3:

before lect17   Splines on the sphere sphspl.pdf 

before lect18   Read Section IV of illpose.pdf  


before lect19    lu.etal.pnas05.pdf   
                 tr1108rr.pdf

before lect19.5  PNAS-2009-Bravo-0902906106.pdf 
                 PNASAppendix PDF.pdf
		 

before lect20    Read szekely.rizzo2009.pdf  
                 Read kong.klein.lee.wahba.2012