Smith J.C., Odense P., Angus R., Bates S.S., Bird C.J., Cormier P., de Freitas A.S.W., Leger C., O'Neill D., Pauley K. & Worms J. 1990. Variation in domoic acid levels in
Nitzschia species: implications for monitoring programs. Bull. Aquacult. Ass. Canada 90: 27-31