@inbook{ GÓMEZ:103-104,

author = { PEDRO GÓMEZ GUZMÁN } ,

title = { MATHEMATICS EDUCATORS¿ ACTIVITIES AND KNOWLEDGE },

booktitle = { THE PROFESSIONAL EDUCATION AND DEVELOPMENT OF TEACHERS OF MATHEMATICS. THE 15TH ICMI STUDY },

isbn = { 978-0-387-09600-1 },

publisher = { Springer },

pages = { 103 - 104 },

year = { 2009 },

}