masse négative
1993 / Negative mass can be positively amusing / Richard H. Price / American Journal of Physics 61 (1993) p. 216 [doi]
2014 / [Notes and Discussions] The concept of negative mass and its application to Helium-balloon-type dynamics / C. J. Dias ; L. N. Gonçalves / American Journal of Physics 82 (2014) p. 997 [doi]