@article{CRMATH_2003__337_11_721_0,
     author = {Sergey Vakulenko and Dmitry Grigoriev},
     title = {Complexity of gene circuits, {Pfaffian} functions and the morphogenesis problem},
     journal = {Comptes Rendus. Math\'ematique},
     pages = {721--724},
     publisher = {Elsevier},
     volume = {337},
     number = {11},
     year = {2003},
     doi = {10.1016/j.crma.2003.10.021},
     language = {en},
}