%0 Journal Article %A Brunovský, Pavol %A Mallet-Paret, John %T Switchings of optimal controls and the equation $y^{(4)}+\vert y\vert^{\alpha}\,sign\,y=0$, $0<\alpha <1$ %J Časopis pro pěstování matematiky %D 1985 %P 302-313 %V 110 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.21136/CPM.1985.118237/ %R 10.21136/CPM.1985.118237 %G en %F 10_21136_CPM_1985_118237