Wall et al., 1970
From dinoflaj2
Wall, D., Guillard, R.R.L., Dale, B., Swift, E. and Watabe, N., 1970: Calcitic resting cysts in Peridinium trochoideum (Stein) Limmermann, an autotrophic marine dinoflagellate. Phycologica, v.9, no.2, p.151-156.
