Erdélyi, A., Magnus, W., Oberhettinger, F., Tricomi, F.G.: Higher Transcendental Functions. Based, in Part, on Notes Left by Harry Bateman, vol. I. McGraw-Hill Book Company Inc, New York (1953) Fanelli, L., Krejčiřík, D., Laptev, A., Vega, L.: On the improvement of ...