Mon-Khmer Languages - Overview of the characteristics of the Mon-Khmer languages. - http://www.anu.edu.au/~u9907217/languages/languages.html
Mon-Khmer Word Order from a Crosslinguistic Perspective - Paper by Matthew S. Dryer arguing that the assumption that languages tend to be consistently head-initial or head-final is not true, and that verb-object order does not exhibit crosslinguistic correlation with the order of various kinds of modifiers. - http://linguistics.buffalo.edu/people/faculty/dryer/dryer/mon.khmer.pdf