Control of ultracapacitors energy exchange [Electronic resource]Roasto, Indrek; Lehtla, Tõnu; Möller, Taavi; Rosin, ArgoEPE-PEMC 2006 : 12th International Power Electronics and Motion Control Conference : Portorož, Slovenia, August 30 - September 1, 2006 : proceedings2006 / p. 1401-1406 : ill. [CD-ROM] https://ieeexplore.ieee.org/document/4778599