Analysis of the type slide of Achnanthes boyei Østrup (Achnanthidiaceae, Bacillariophyta)
B. Van de Vijver, C. E. Wetzel, Z. Levkov and L. Ector
Notulae Algarum, no. 96, pp. 1-6, 2019
http://www.notulaealgarum.com/documents/Notulae%20algarum%20No.96.pdf