We have posted a manuscript on BioRXiv: Xun Wang*, Matthias Merkel*, Leo B. Sutter*, Gonca Erdemci-Tandogan, M. Lisa Manning, Karen E. Kasza. “Anisotropy links cell shapes to a solid-to-fluid transition during convergent extension”,  https://doi.org/10.1101/781492 (2019).  In this manuscript we use a combination of vertex models and experimental analysis of convergent extension in the fruit fly to understand how the fluid-solid transition is affected by anisotropic stresses.