In this last paper Mathisson applied his general variational method to the case of a particle for which second moments are important but third and higher moments are negligible.
Sa papel na ito huling Mathisson inilapat sa kanyang pangkalahatang variational paraan upang ang mga kaso ng isang particle na kung saan ikalawang sandali ay mahalaga ngunit ikatlong at mas mataas na sandali ay napakababa.