Update README.md

README.md

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  Code related to meshing and interpolation of grain boundaries by representing 5DOF of grain boundaries as grain boundary octonions and mapping them into a Voronoi Fundamental Zone. ([https://github.com/sgbaird-5DOF/interp](https://github.com/sgbaird-5DOF/interp))
 
 See
-> 1. Baird, S. G.; Homer, E. R.; Fullwood, D. T.; Johnson, O. K. Five Degree-of-Freedom Property Interpolation of Arbitrary Grain Boundaries via Voronoi Fundamental Zone Octonion Framework. 2021. https://arxiv.org/abs/2104.06575 (Submitted to Computational Materials Science)
+> 1. Baird, S. G.; Homer, E. R.; Fullwood, D. T.; Johnson, O. K. Five Degree-of-Freedom Property Interpolation of Arbitrary Grain Boundaries via Voronoi Fundamental Zone Framework. Computational Materials Science 2021, 200, 110756. https://doi.org/10.1016/j.commatsci.2021.110756.
 > 1. [GB_octonion_code](https://github.com/ichesser/GB_octonion_code)
 > 1. Chesser, I., Francis, T., De Graef, M., & Holm, E. A. (2020). Learning the Grain Boundary Manifold: Tools for Visualizing and Fitting Grain Boundary Properties. Acta Materialia. https://doi.org/10.2139/ssrn.3460311
 > 1. Francis, T., Chesser, I., Singh, S., Holm, E. A., & De Graef, M. (2019). A geodesic octonion metric for grain boundaries. Acta Materialia, 166, 135–147. https://doi.org/10.1016/j.actamat.2018.12.034