@article{Friese11Minimization, author = {Sylvia Friese and Helmut Seidl and Sebastian Maneth}, title = {Earliest {N}ormal {F}orm and {M}inimization for {B}ottom-{U}p {T}ree {T}ransducers}, journal = {International Journal of Foundations of Computer Science}, year = 2011, pages = {1607-1623}, volume = {22}, number = {7}, }