@phdthesis{Ockenfeld, author = {Ockenfeld, Klaus}, title = {Die Bedeutung verminderter Wasserf{\"u}hrung f{\"u}r phytoplanktongekoppelte Stoffumsetzungen und den Sauerstoffhaushalt der Spree}, pages = {127}, language = {de} } @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} }