@inproceedings{3a8a3963e0e14c7b9ed2eb70b5bf983d,

title = "Sensible mathematics: sense making of trigonometric relationships in the context of lesson study",

keywords = "METIS-299326",

author = "Verhoef, {Neeltje Cornelia} and D.O. Tall",

year = "2013",

month = jul,

day = "28",

language = "English",

pages = "--",

booktitle = "Unknown",

note = "37th Conference of the International Group for the Psychology of Mathematics Education (PME 37), “Mathematics Learning Across the Life Span” Kiel, July 28 to August 2, 2013 ; Conference date: 28-07-2013 Through 02-08-2013",

}