considering the estimated order of the LECs [@EM10; @JV13; @JB150] which, however, is source dependent.

In this section we present only the TRV Lagrangian terms which can give some contribution to TRV $NN$ and $NNN$ potential up to N2LO in terms of pion field. In order to remain source independent we consider isoscalar, isovector and isotensor terms and we determine the chiral order of the TRV Lagrangian considering only the dynamical part. Namely, in the following we will consider all the TRV LECs to be equally important. To deal with a specific source of TRV, it will be sufficient to set some of the LECs to be zero, etc. At order $Q^0$ the TRV pion-nucleon Lagrangian includes three terms  [@EM10; @JB150] $$\begin{aligned}
  {\cal{L}}_{\rm TRV}^{\pi N\,(0)}=g_0\overline{\psi}\vec{\pi}\cdot\vec{\tau}
  \psi+g_1\overline{\psi}\pi_3\psi+g_2\overline{\psi}\pi_3\tau_3\psi\,,\end{aligned}$$ where $\vec{\pi}$ is the pion field and $\psi$ is the nucleon field. To be noticed that the isotensor term is usually considered of higher order. At the same order a purely pionic interaction appears [@JB150], which reads $$\begin{aligned}
  {\cal{L}}_{\rm TRV}^{3\pi\,(0)}=M\Delta_3 \pi_3\pi^2\,,\end{aligned}$$ where $M=938.88$ MeV is the average nucleon mass. At order $Q$ we have only one term that can give contribution to the potential up to N2LO and it reads, given explicitly as, $$\begin{aligned}
  