Balech E.& Tangen K. 1985. Morphology and taxonomy of toxic species in the tamarensis group (Dinophyceae) Alexandrium excavatum (Braarud) comb. nov. and Alexandrium ostenfeldii(Paulsen) comb. nov. Sarsia 70: 333-343.
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Balech E & Tangen K comb nov; Alexandrium
1985
Morphology and taxonomy of toxic species in the tamarensis group (Dinophyceae) Alexandrium excavatum (Braarud