1. Electrocardiography in children;Ashman, R.;Mod. Conc. cardiov. Dis,1938
2. and 149;Bancroft, H.;Introduction of Biostatistics,1957
3. area of the body The height-weight index of build in relation during post-natal development;Bardeen, C.R.,1920
4. Etude statistique del'electrocardiogramme normal dans un groupe de 406 garcons ages de 6 a 16 ans;Beheyt, P.; Cloetens, W.; De Mey, D.;Acta padiat. belg,1959
5. Electrocardiograms on 167 average healthy infants and children;Burnett, C.T.; Taylor, E.L.;Amer. Heart J,1936