Oil on canvas, pencil on paper, ink on paper, digital images.
to view a large selection of the above: http://fineartamerica.com/profiles/david-wolk.html?tab=artworkgalleries
to view portfolio of all available oil paintings: https://www.dropbox.com/sh/zf6fp5c6tn41q6w/AADP4us86ZRwkDVMAweiM7Yja/portfolios/all%20available%20paintings-Ta%27anis%20Esther%205774%20-%20Copy.pdf
to view portfolio of paintings available from the artist in Israel: https://www.dropbox.com/sh/zf6fp5c6tn41q6w/AAA1HU0HQYJgCo0cvFXiMYNwa/portfolios/all%20available%20paintings%20in%20Bet%20Shemesh%20Bain%20Hamitzarim%205774.pdf
to view portfolio of high-quality prints available from the artist: https://www.dropbox.com/sh/zf6fp5c6tn41q6w/AACzyQXNepO4D7O1oHEeiDL0a/portfolios/portfolio%20of%20paintings%20from%20which%20it%20is%20possible%20to%20make%20highest%20quality%20prints%2C%20revised%20adar%205773.pdf