Jones, A.G.; Young, D.A. 1983. Generic concepts of aster (Asteraceae): A comparison of cladistic, phenetic, and cytological approaches. Systematic Botany. 8(1): 71-84.
Jones, A.G.; Young, D.A. 1983. Generic concepts of aster (Asteraceae): A comparison of cladistic, phenetic, and cytological approaches. Systematic Botany. 8(1): 71-84.