Sterrenburg, F. A., Stidolph, S. R., Sar, E. A., & Sunesen, I. (2015).

A comparative study of Pleurosigma subrectum and P. acus (Bacillariophyta)

. Phytotaxa, 207(3), 273–280. https://doi.org/10.11646/phytotaxa.207.3.5