ON THE HYPOTHESIS OF UNIQUENESS OF THE BALTIC HERRING (CLUPEA HARENGUS MEMBRAS) CATCHES ON THE BASIS OF POLYCHLORINATED BIPHENYLS CONTENT EVALUATIONS; pp. 109–114

ACCUMULATION OF HEAVY METALS IN THE SOFT TISSUES AND SHELLS OF DREISSENA POLYMORPHA (PALLAS) IN LAKE PEIPSI-PIHKVA; pp. 115–121

TOTAL PHOSPHORUS IN ESTONIAN LAKES; pp. 122–130

ON THE ENVIRONMENT AND ZOOPLANKTON DYNAMICS IN THE GULF OF FINLAND IN 1961–1990; pp. 131–140

ON A DISCRETE MODEL OF ECOLOGICAL PROCESSES; pp. 195–108