Noga Alon Charles J. Colbourn Alan C. H. Ling Martin Tompa Equireplicate Balanced Binary Codes for Oligo Arrays. 481-497 2001 14 SIAM J. Discrete Math. 4 http://dx.doi.org/10.1137/S0895480101383895 db/journals/siamdm/siamdm14.html#AlonCLT01