Part,  Chapter, Paragraph

1   II,     5.  5.  3|   Law 16:253-267.~Blom S, Heijbel J, Bergfors PG (1978): Incidence
2   II,     5.  5.  3| Forsgren L, Blomquist HK, Heijbel J (1993): A community-based
3   II,     5.  5.  3|  Sidenvall R, Forsgren L, Heijbel J (1996): Prevalence and