Endosymbiosis, cell evolution, and speciation. - Ulrich Kutschera; Karl J. Niklas (Theory Biosci., 2005)

Photosynthesis research on yellowtops: Macroevolutionn in progress. - Ulrich Kutschera; Karl J. Niklas (Theory Biosci., 2007)

Macroevolution via secondary endosymbiosis: a Neo-Goldschmidtian view of unicellular hopeful monsters and Darwin's primordial intermediate form. - Ulrich Kutschera; Karl J. Niklas (Theory Biosci., 2008)

Metabolic scaling theory in plant biology and the three oxygen paradoxa of aerobic life. - Ulrich Kutschera; Karl J. Niklas (Theory Biosci., 2013)

The evolution of the plant genome-to-morphology auxin circuit. - Ulrich Kutschera; Karl J. Niklas (Theory Biosci., 2016)

From Goethe's plant archetype via Haeckel's biogenetic law to plant evo-devo 2016. - Karl J. Niklas; Ulrich Kutschera (Theory Biosci., 2017)

A Superellipse with Deformation and Its Application in Describing the Cross-Sectional Shapes of a Square Bamboo. - Weiwei Huang; Yueyi Li; Karl J. Niklas; Johan Gielis; Yongyan Ding; Li Cao; Peijian Shi 001 (Symmetry, 2020)

A General Model for Describing the Ovate Leaf Shape. - Peijian Shi 001; Kexin Yu; Karl J. Niklas; Julian Schrader; Yu Song; Renbin Zhu; Yang Li 166; Hailin Wei; David Ratkowsky (Symmetry, 2021)

Rotated Lorenz Curves of Biological Size Distributions Follow Two Performance Equations. - Peijian Shi 001; Linli Deng; Karl J. Niklas (Symmetry, 2024)