@article{  
   author = {P. Baldi},
   title = {Neural Networks, Orientations of the Hypercube and Algebraic Threshold Functions.},
   journal = {IEEE Transactions on Information Theory},
   volume = {34},
   number = {3},
   pages = {523-530},
   note = {},
   abstract = {},
   keywords = {},
   year = {1988}
}