@article {VeVa04,
AUTHOR = {V{\"a}{\"a}n{\"a}nen, Jouko and Veli{\v{c}}kovi{\'c}, Boban},
TITLE = {Games played on partial isomorphisms},
JOURNAL = {Arch. Math. Logic},
FJOURNAL = {Archive for Mathematical Logic},
VOLUME = {43},
YEAR = {2004},
NUMBER = {1},
PAGES = {19--30},
}