THE PHYSIOGNOMY AND STRUCTURE OF THE BENTHIC MACROPHYTE COMMUNITIES ON ROCKY SHORES IN THE SOUTHWESTERN ARCHIPELAGO OF FINLAND (SEILI ISLANDS) = PHYSIONOMIE ET STRUCTURE DES ASSOCIATIONS DE MACROPHYTES BENTHIQUES DU LITTORAL ROCHEUX DU SUD-OUEST DE L'ARCHIPEL DE FINLANDE (ILES SEILI)RAVANKO O.1972; NOVA HEDWIGIA; ALLEM.; DA. 1972; VOL. 23; NO 2-3; PP. 363-403; BIBL. 1 P.Serial Issue

OBSERVATIONS FROM UNIFORM EXPERIMENTAL PLOT ON INTROGRESSION BETWEEN GEUM URBANUM AND G. RIVALE IN SW FINLANDRAVANKO O.1979; ANN. BOT. FENN.; FIN; DA. 1979; VOL. 16; NO 1; PP. 43-49; BIBL. 16 REF.Article

STUDIES ON THE DEVELOPMENT OF THE BROWN ALGA DESMOTRICHUM UNDULATUM IN NATURE AND IN CULTURE = ETUDE, DANS LA NATURE ET EN CULTURE, DU DEVELOPPEMENT DE LA PHEOPHYCEE D. U.RAVANKO O.1975; MEMOR. SOC. FAUNA FLORA FENN.; FINL.; DA. 1975; NO 51; PP. 19-23; BIBL. 11 REF.Article

On the life history of Polysiphonia violacea (Rhodophyta, Ceramiales) in the SW archipelago of FinlandRAVANKO, O.Annales botanici Fennici. 1989, Vol 26, Num 3, pp 291-295, issn 0003-3847Article

The chromosomes in three Clara species (Charophyta) in the SW archipelago of FinlandRAVANKO, O.Annales botanici Fennici. 1988, Vol 25, Num 1, pp 85-88, issn 0003-3847Article

BENTHIC MACROALGAE INDICATING CHANGES IN THE TURKU SEA AREA.PEUSSA M; RAVANKO O.1975; MERENTUTKIMUSLAIT. JULK.; SUAMI; DA. 1975; NO 239; PP. 339-343; BIBL. 13 REF.; (BALTIC SYMP. MAR. BIOL. 3. PROC.; HELSINKI; 1973)Conference Paper

ON SOME SPECIES OF THE GENUS LIEMOPHORA IN FINLANDRAVANKO O; TYNNI R.1974; MEMOR. SOC. FAUNA FLORA FENN.; FINL.; DA. 1974; NO 50; PP. 5-14; BIBL. 8REF.Article

The taxonomic value of morphological and cytological characteristics in Oxycoccus (subgenus of Vaccinium, Ericaceae) species in FinlandRAVANKO, O.Annales botanici Fennici. 1990, Vol 27, Num 3, pp 235-239, issn 0003-3847Article