@article {LSV93,
AUTHOR = {Louveau, A. and Shelah, S. and Veli{\v{c}}kovi{\'c}, B.},
TITLE = {Borel partitions of infinite subtrees of a perfect tree},
JOURNAL = {Ann. Pure Appl. Logic},
FJOURNAL = {Annals of Pure and Applied Logic},
VOLUME = {63},
YEAR = {1993},
NUMBER = {3},
PAGES = {271--281},
}