(PNG) basic.png
 (PNG) fig_01a.png
 (PNG) fig_01a_big.png
 (PNG) fig_01b.png
 (PNG) fig_01b_big.png
 (PNG) fig_02.png
 (PNG) fig_02_big.png
 (PNG) fig_03a.png
 (PNG) fig_03b.png
 (PNG) fig_04.png
 (PNG) fig_04_big.png
 (PNG) fig_05.png
 (PNG) fig_05_big.png