Apparently, this user prefers to keep an air of mystery about them.
55 TikZ set node label position more precisely jun 7 '12
23 How to get only one vertically centered equation number in align environment with two equations jun 12 '12
8 pgfplots need help with complicated stacked bar chart using selected rows from data table jul 21 '12
1 ybar stacked plot with negative coordinates aug 17 '12