Takahashi, Yasushi (1988). «Towards the Many-Body Theory with the Galilei Invariance as a Guide: Part I». Fortschritte der Physik/Progress of Physics. 36: 63–81. Bibcode:1988ForPh..36...63T. doi:10.1002/prop.2190360105
Takahashi, Yasushi (1988). «Towards the Many-Body Theory with the Galilei invariance as a Gluide Part II». Fortschritte der Physik/Progress of Physics (em inglês). 36: 83–96. Bibcode:1988ForPh..36...83T. doi:10.1002/prop.2190360106
Omote, M.; Kamefuchi, S.; Takahashi, Y.; Ohnuki, Y. (1989). «Galilean Covariance and the Schrödinger Equation». Fortschritte der Physik/Progress of Physics (em alemão). 37: 933–950. Bibcode:1989ForPh..37..933O. doi:10.1002/prop.2190371203
Takahashi, Yasushi (1988). «Towards the Many-Body Theory with the Galilei Invariance as a Guide: Part I». Fortschritte der Physik/Progress of Physics. 36: 63–81. Bibcode:1988ForPh..36...63T. doi:10.1002/prop.2190360105
Takahashi, Yasushi (1988). «Towards the Many-Body Theory with the Galilei invariance as a Gluide Part II». Fortschritte der Physik/Progress of Physics (em inglês). 36: 83–96. Bibcode:1988ForPh..36...83T. doi:10.1002/prop.2190360106
Omote, M.; Kamefuchi, S.; Takahashi, Y.; Ohnuki, Y. (1989). «Galilean Covariance and the Schrödinger Equation». Fortschritte der Physik/Progress of Physics (em alemão). 37: 933–950. Bibcode:1989ForPh..37..933O. doi:10.1002/prop.2190371203