Kallenberg, O., Random Measures, 4th edition. Academic Press, New York, London; Akademie-Verlag, Berlin (1986). ISBN0-12-394960-2MR854102. An authoritative but rather difficult reference.
Jan Grandell, Point processes and random measures, Advances in Applied Probability 9 (1977) 502-526. MR0478331JSTOR A nice and clear introduction.
Daley, D. J.; Vere-Jones, D. (2003). An Introduction to the Theory of Point Processes. Probability and its Applications. doi:10.1007/b97277. ISBN0-387-95541-0.
jstor.org
Jan Grandell, Point processes and random measures, Advances in Applied Probability 9 (1977) 502-526. MR0478331JSTOR A nice and clear introduction.