I studied leverworks in waves since 1999, mainly through cycles of making models, observing them, and asking questions leading to new models. I made a preliminary documentation in 1999, presented my studies at two conferences in 2001, published an article in 2002 and finally a book in 2012.

  1999 preliminary documentation – description | slides

  2001 two conferences – description

  2002 article – description | download pdf-file

  2012 book – description | contents | slides