Text this: Investigation of box diagrams for the peak of $$Z_{cs}(3985)$$ Z cs ( 3985 ) in $$e^+e^- \rightarrow D^-_s D^{*0} K^+$$ e + e - → D s - D ∗ 0 K + and $$ D^{*-}_s D^0 K^+$$ D s ∗ - D 0 K +