The article introduces the key linguistic works which dealt with the characteristics of the Dolenjska and East-Dolenjska sub-dialects. The linguistic works written from the 16th century until the 1930s (e.g. P. Trubar, H. Megiser, J. Kopitar, F. Metelko, F. Miklošič) include the Dolenjska sub-dialects in wider classifications of Slovenian dialects. Beside the Slovenian linguists some Slavists of European significance (e.g. P. J. Šafárik, I. Sreznjevski, J. Baudouin de Courtenay, L. Tesnière) dealt with these dialects, too. Slovenian dialectologist Fran Ramovš was the first to identify and characterize the Dolenjska subdialects in detail (1933, 1935). Tine Logar introduced the samples of phonetically transcribed texts of the individual Dolenjska and East-Dolenjska sub-dialects including a short easy-to-follow commentary on the spelling (1975) and Jakob Rigler did the analysis of the development in the Dolenjska vocalism, the characteristics of individual sub-dialects and encyclopaedic description of the spelling in all the dialects (1963, 1980, 1986, 1988). The least researched sub-dialect was that of the East-Dolenjska area. Until the 1990s, when Vera Smole began to study its spelling, morphology and lexis, and beside the identification and characteristics done by Ramovš, only the phonological description of the village Bučka was carried out (F. Novak, 1981).