.[https://en.wikipedia.org/wiki/Digital_object_identifier doi]:[https://doi.org/10.1103/PhysRevE.67.046107 10.1103/PhysRevE.67.046107] | .[https://en.wikipedia.org/wiki/Digital_object_identifier doi]:[https://doi.org/10.1103/PhysRevE.67.046107 10.1103/PhysRevE.67.046107] |