van Dijk, W.; Kiers, K. A. (1992). "Time delay in simple one-dimensional systems". American Journal of Physics. 60 (6). American Association of Physics Teachers (AAPT): 520–527. Bibcode:1992AmJPh..60..520V. doi:10.1119/1.16866. ISSN0002-9505.
van Dijk, W.; Kiers, K. A. (1992). "Time delay in simple one-dimensional systems". American Journal of Physics. 60 (6). American Association of Physics Teachers (AAPT): 520–527. Bibcode:1992AmJPh..60..520V. doi:10.1119/1.16866. ISSN0002-9505.
van Dijk, W.; Kiers, K. A. (1992). "Time delay in simple one-dimensional systems". American Journal of Physics. 60 (6). American Association of Physics Teachers (AAPT): 520–527. Bibcode:1992AmJPh..60..520V. doi:10.1119/1.16866. ISSN0002-9505.