https://www.researchgate.net/publication/259508641_Modelling_and_behaviour_of_cylindrical_shell_structures_with_helical_features https://www.researchgate.net/pu

https://www.researchgate.net/publication/259508641_Modelling_and_behaviour_of_cylindrical_shell_structures_with_helical_features https://www.researchgate.net/publication/259508641_Modelling...