@article{DiethelmTuan2022, author = {Kai Diethelm and Hoang The Tuan}, title = {Upper and lower estimates for the separation of solutions to fractional differential equations}, journal = {Fractional Calculus and Applied Analysis}, volume = {25}, pages = {166 -- 180}, doi = {10.1007/s13540-021-00007-x}, year = {2022}, }