no. 6
Differential inclusions with free time
Annales de l'I.H.P. Analyse non linéaire, Tome 5 (1988) no. 6, pp. 573-593. 
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     pages = {573--593},
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     number = {6},
     year = {1988},
     mrnumber = {978672},
     zbl = {0672.49019},
     language = {en},
     url = {http://www.numdam.org/item/AIHPC_1988__5_6_573_0/}
}
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Loewen, Philip D.; Clarke, Frank H.; Vinter, Richard B. Differential inclusions with free time. Annales de l'I.H.P. Analyse non linéaire, Tome 5 (1988) no. 6, pp. 573-593. http://www.numdam.org/item/AIHPC_1988__5_6_573_0/

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