Martin Kaptein published an article about the synaesthesia of the Russian composer Alexander and its practical uses in the field of education. This article was published in the 117th editition of the Dutch-Language Paper Piano Bulletin. Piano Bulletin is part of EPTA (European Piano Teachers Association).
You can find the full article (Dutch) here (scan).
This dutch article is based on Martin's Master Thesis (English) with the title: Colors in Scriabin’s Sonata No.8: Exploring the relation between color and harmony in Scriabin’s music.