1. The Psycho–Biology of Language: An Introduction to Dynamic Philology;Zipf,1968
2. Statistical laws in linguistics;Altmann,2016
3. In narrative texts punctuation marks obey the same statistics as words;Kulig;Inform. Sci.,2017
4. Quantitative Linguistics;Herdan,1964
5. Information Retrieval: Computational and Theoretical Aspects;Heaps,1978