@misc{NixdorfFysonKrumbeck, author = {Nixdorf, Brigitte and Fyson, Andrew and Krumbeck, Hartwig}, title = {Review plant life in extremely acidic waters}, series = {Environmental and Experimental Botany}, volume = {46}, journal = {Environmental and Experimental Botany}, number = {3}, issn = {0098-8472}, pages = {203 -- 211}, language = {en} } @misc{Krumbeck, author = {Krumbeck, Hartwig}, title = {Measurement of photosynthetic carbon fixation in aquatic systems}, series = {Rostocker meeresbiologische Beitr{\"a}ge}, journal = {Rostocker meeresbiologische Beitr{\"a}ge}, number = {6}, issn = {0943-822X}, pages = {11 -- 15}, language = {en} } @misc{KrumbeckOckenfeld, author = {Krumbeck, Hartwig and Ockenfeld, Klaus}, title = {Measurement of primary production in aquatic systems by the radiocarbon method}, series = {Rostocker meeresbiologische Beitr{\"a}ge}, journal = {Rostocker meeresbiologische Beitr{\"a}ge}, number = {6}, issn = {0943-822X}, pages = {93 -- 100}, language = {en} }