@article {icseri2015estimation,
	title = {Estimation of digraph costs for keyboard layout optimization},
	journal = {International Journal of Industrial Ergonomics},
	volume = {48},
	year = {2015},
	pages = {127{\textendash}138},
	publisher = {Elsevier},
	author = {{\.I}{\c s}eri, Ali and Mahmut Ek{\c s}io{\u g}lu}
}
@article {ekcsiouglu2015estimation,
	title = {An Estimation of Finger-Tapping Rates and Load Capacities and the Effects of Various Factors},
	journal = {Human Factors: The Journal of the Human Factors and Ergonomics Society},
	year = {2015},
	pages = {0018720814563976},
	publisher = {SAGE Publications},
	author = {Mahmut Ek{\c s}io{\u g}lu and {\.I}{\c s}eri, Ali}
}
