D. Persici and A. Rimondi, “Elika, Variable Flow With Fixed Displacement Helical Pump”, in International Conference Fluid Power 2025: Conference Proceedings, vol. 2025, D. Lovrec and V. Tič , Eds. Univerzitetna založba Univerze v Mariboru, 2025, pp. 61–78. doi: 10.18690/um.fs.7.2025.6.