1. Persistence of pertussis in an immunized population: results of the Nova Scotia Enhanced Pertussis Surveillance Program;Halperin;J. Pediatr.,1989
2. Pertussis outbreak in the Yukon Territory—1989;Varughese;Can. Commun. Dis. Rep.,1990
3. Pertussis consensus conference;Laboratory Centre for Disease Control,1993
4. Resurgence of pertussis in Montérégie, Quebec—1990–1994;Milord;Can. Commun. Dis. Rep.,1995
5. Pertussis in Quebec: ongoing epidemic since the late 1980s;De Serres;Can. Commun. Dis. Rep.,1995