Reference:

Kai Puolamäki and Samuel Kaski. Bayesian solutions to the label switching problem. Technical Report TKK-ICS-R7, TKK Reports in Information and Computer Science, 2008.

Suggested BibTeX entry:

@techreport{Puolamaki09rep,
    author = {Kai Puolam\"aki and Samuel Kaski},
    institution = {TKK Reports in Information and Computer Science},
    number = {TKK-ICS-R7},
    title = {Bayesian Solutions to the Label Switching Problem},
    year = {2008},
}