Low-temperature nonlinear effects of conductivity of lightly doped cuprates La2–xSrxCuO4 in antiferromagnetic state - N. V. Dalakova; B. I. Belevtsev; Ju. Beljaev; A. S. Panfilov; N. P. Bobrysheva; A. A. Seljutin (Low Temperature Physics, 2014)