Kypuros, Javier A.; Longoria, Raul G. «Model Synthesis for Design of Switched Systems Using a Variable Structure System Formulation». Journal of Dynamic Systems, Measurement, and Control, vol. 125, 4, 29-01-2004, pàg. 618–629. DOI: 10.1115/1.1636774. ISSN: 0022-0434. «The hydraulic-ram pump ... structure parallels that of the boost converter making it a hydraulic analog»
Longoria, R.G.; Kypuros, J.A.; Raynter, H.M.. «Bond graph and wave-scattering models of switched power conversion». A: 1997 IEEE International Conference on Systems, Man, and Cybernetics. Computational Cybernetics and Simulation. 2, 1997, p. 1522–1526. DOI10.1109/ICSMC.1997.638209. ISBN 978-0-7803-4053-4. «Indeed, this self-acting pump has much to offer in a parallel study with its electrical cousin.»
Kypuros, Javier A.; Longoria, Raul G. «Model Synthesis for Design of Switched Systems Using a Variable Structure System Formulation». Journal of Dynamic Systems, Measurement, and Control, vol. 125, 4, 29-01-2004, pàg. 618–629. DOI: 10.1115/1.1636774. ISSN: 0022-0434. «The hydraulic-ram pump ... structure parallels that of the boost converter making it a hydraulic analog»