Yin, C.P.; Wu, Z.P.; Dong, Y.W.; You, Y.C.; Liao, T. (2019). Femtosecond laser helical drilling of nickel-base single-crystal super-alloy: Effect of machining parameters on geometrical characteristics of micro-holes, Advances in Production Engineering & Management, Vol. 14, No. 4, 407-420, https://doi.org/10.14743/apem2019.4.337