1. Sesongvariasjon hos fastsittende Ascophyllum nodosum-planter;Baardseth;Norsk Inst. for Tang-og Tareforsk. Forelobige Rapp.,1958
2. Sesongvariasjon av fastsittende Ascophyllum-planter 1958;Baardseth;Norsk Inst. for Tang-og Tareforsk. Forelobige Rapp.,1959
3. Sesongvarisjoner hos Ascophyllum 1963–1965;Baardseth;Norsk Inst. for Tang- og Tareforsk. Forelobige Rapp.,1965
4. Seasonal variation of Ascophyllum nodosum (L.) Le Jol. in the Trondheimsfjord as described by the absolute live and dry weight and the relative content of dry matter, ash and fruitbodies;Baardseth;Norsk Inst. for Tang-og Tareforsk. Forelobige Rapp.,1967
5. Seasonal variation in Ascophyllum nodosum (L.) Le Jol. in the Trondheimsfjord with respect to the absolute live and dry weight and the relative contents of dry matter, ash and fruit bodies;Baardseth;Botanica mar.,1970