Numerical analysis of the on-state of diode structures based on direct-gap semiconductorsVelmre, Enn; Freidin, Boris; Udal, AndresPhysica scripta : an international journal for experimental and theoretical physics1981 / p. 468-471 : ill https://www.ester.ee/record=b2244094*est https://iopscience.iop.org/article/10.1088/0031-8949/24/2/026/pdf