Inhibition of the vacuolar H(+)-ATPase with bafilomycin reduces delivery of internalized molecules from mature multivesicular endosomes to lysosomes in HEp-2 cells Van Deurs, B.; Holm, P.K.; Sandvig, K. European Journal of Cell Biology 69(4): 343-350 1996 https://eurekamag.com/research/008/881/008881098.php