Shenglin Zhou Block Primitive 2-(<i>v</i>, <i>k</i>, 1) Designs Admitting a Ree Group of Characteristic Two. 159-169 2005 36 Des. Codes Cryptography 2 http://dx.doi.org/10.1007/s10623-004-1702-8 db/journals/dcc/dcc36.html#Zhou05