Reference

J. Zentgraf, Konrad Bachmann, Kenton L. Chambers, H. James Price (1984): Single-Gene Heterozygotes Derived from the Polygenic Pappus Part System of Microseris Hybrid C 34 (Asteraceae-Lactuceae) – Österreichische Botanische Zeitschrift = Plant Systematics and Evolution – 147: 205 - 226.