by Luci Harue Fatori, Maria Zegarra Garay, Jaime E. Munoz Rivera
Published in Electronic journal of differential equations (27.03.2012)

by Alves, Margareth, Rivera, Jaime Muñoz, Sepúlveda, Mauricio, Villagrán, Octavio Vera, Garay, María Zegarra
Published in Mathematische Nachrichten (01.04.2014)

by Zegarra Garay, Maria, Acuña Montañez, Walter, Flores dionicio, Julio, Albañil Rivadeneira, Rubén, Rojas Rojas, Victoria, Pariona Vilca, Féliz, Gonzáles Chávez, Máximo, Sempértegui Gonzáles, Melanio
Published in Pesquimat (24.09.2016)