@inbook{ BUELA_SIERRA:293-308,

author = { GUALBERTO BUELA CASAL and JUAN CARLOS SIERRA FREIRE } ,

title = { Los trastornos del sueño },

booktitle = { Manual de Psicopatología },

publisher = { McGraw-Hill },

pages = { 293 - 308 },

year = { 2008 },

}