@TechReport {chks.stanford91,
    author = {S. Ceri and {M.A.W.} Houtsma and {A.M.} Keller and P. Samarati},
    title = {A Classification of Update Methods for Replicated Databases},
    publisher = {CS Dept., Stanford University (STAN-CS-91-1392)},
    month = {October},
    year = {1991}
}