SHARMA, R., P. GUPTA, and R. K. TUTEJA. “LOWER BOUNDS ON $L^t_{1:1}(D)$ IN TERMS OF RENYI ENTROPY”. Tamkang Journal of Mathematics, vol. 22, no. 4, Dec. 1991, pp. 335-42, doi:10.5556/j.tkjm.22.1991.4622.