This article in the Guardian engages with Hilma Klint's Visionary Art, starting with this question: "Was Hilma af Klint Europe’s first abstract artist – before even Kandinsky and Mondrian? As an exhibition of her extraordinary, occult-inspired works opens at the Serpentine Gallery, London, we travel to Sweden to find out"
http://www.theguardian.com/artanddesign/2016/feb/21/hilma-af-klint-occult-spiritualism-abstract-serpentine-gallery
http://www.theguardian.com/artanddesign/2016/feb/21/hilma-af-klint-occult-spiritualism-abstract-serpentine-gallery
