added 2 refs to README at Carlos' request

Ignore-this: 62c445c786b11050bb79800ba29fbd55

darcs-hash:20130211030917-c8de0-ce140a2767c273771662058f2be1af99352925ec.gz

esch/README

@@ -11,10 +11,17 @@ the following paper and Ph.D. thesis:
     University of Campinas, (2010)
     http://www.bibliotecadigital.unicamp.br/document/?code=000767537&opt=4&lg=en_US
 
+The algorithms are adapted from ideas described in:
+
+    H.-G. Beyer and H.-P. Schwefel. Evolution Strategies: A Comprehensive Introduction. Journal Natural Computing, 1(1):3–52, 2002.
+
+    Ingo Rechenberg (1971): Evolutionsstrategie – Optimierung technischer Systeme nach Prinzipien der biologischen Evolution (PhD thesis). Reprinted by Fromman-Holzboog (1973).
+
 It is distributed under the "MIT license" given in the attached
-COPYRIGHT file (similar to the rest of NLopt), and was financially by
-the São Paulo Science Foundation (FAPESP - Fundação de Amparo à
-Pesquisa do Estado de São Paulo) under the grant 2012/14553-9.
+COPYRIGHT file (similar to the rest of NLopt), and was
+supportedfinancially by the São Paulo Science Foundation (FAPESP -
+Fundação de Amparo à Pesquisa do Estado de São Paulo) under the grant
+2012/14553-9.
 
 Carlos Henrique da Silva Santos
 January 2013