"9 Yeast Vectors" http://dbb.urmc.rochester.edu/labs/Sherman_f/yeast/9.html (accessed Sept. 30, 2007).
The details of "9 Yeast Vectors" are available on the webpage located at http://dbb.urmc.rochester.edu/labs/Sherman_f/yeast/9.html as of September 30, 2007.