Ink& collage on Kozo paper on board, 24x28cm, 2013 Next Substratum 2 Previous Continuum of Variation Current Series2013 1999 (4) 2000 (4) 2004 (11) 2005 (6) 2006 (10) 2009 (7) 2011 (7) 2012 (11) 2013 (29) 2014 (27) 2015 (14) 2016 (21) 2017 (24) 2018 (20)