Shah, P., Venkiteswaran, J.J., Molot, L.A., Higgins, S.N., Schiff, S.L., Baulch, H.M., Curry, R.A., Kidd, K.A., Korosi, J.B., Paterson, A.M., Pick, F.R., Walters, D., Watson, S.B., Zastepa, A. (2023) Low cobalt limits cyanobacteria heterocyst frequency in culture but potential for cobalt limitation of frequency in nitrogenlimited surface waters is unclear. .