American Psychological Association 6th edition

Krastev, R. K. (o. J.). Approximate values of the integral logarithm and the exponential integral function.

ISO-690 (author-date, English)

KRASTEV, Roumen K., [no date]. Approximate values of the integral logarithm and the exponential integral function. .

Modern Language Association 9th edition

Krastev, R. K. Approximate Values of the Integral Logarithm and the Exponential Integral Function.

Mohr Siebeck - Recht (Deutsch - Österreich)

Krastev, Roumen K.: Approximate values of the integral logarithm and the exponential integral function.,

Emerald - Harvard

Krastev, R.K. (o. J.). „Approximate values of the integral logarithm and the exponential integral function.“.

Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.