Articles about how to Compose an endgamestudy.
May be you first start to read the rules: http://www.sci.fi/~stniekat/books/hcc6.pdf
From the British Endgame Study News March 1996:
How I became a great composer, by Gady Costeff
(More about Chess Composition by Gady Costeff on: http://gadycosteff.com)
Meine Schachkompositionen, by Gerhard Josten.
(More about chess with Gerhard Josten on http://www.gerhard-josten.de/schach/)
From the (old) EBUR Promotion magazine an article (in Dutch) by Wouter Mees about how to compose:
From the (old) EBUR Promotion magazine an article (in Dutch) by Ignace Vandecasteele about how to compose a miniature.
Source (powerpoint): Lezing / Workshop Max Euwe Centrum 2012 (dutch) about "Chess studies composing with a computer".
Same in PDF: Workshop Van den Herik and Jan Timman 2012 see below.