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+## DNATCO Extensions
+
+### Confal Pyramids
+
+The Confal Pyramids extensions displays tetrahedron-like pyramids. These pyramids are a simple visual representation of nucleotide conformer classes that can be assigned to individual steps in nucleic acid structures.
+
+For more information, see:
+* [Černý et al., Nucleic Acids Research, 44, W284 (2016)](http://dx.doi.org/10.1093/nar/gkw381)
+* [Schneider et al., Acta Cryst D, 74, 52-64 (2018)](http://dx.doi.org/10.1107/S2059798318000050)
+* [Schneider et al., Genes, 8(10), 278, (2017)](http://dx.doi.org/10.3390/genes8100278)