The author gives a survey of how certain types of Markushevich bases \((a_i)\), for a separable Banach space, can be described by properties of the geometry \(g(a_i)\) of the sequence \((a_i)\). Here \(g(a_i)= \{W_S; S\subset\mathbb{N}\}\), where \(W_S\) is the closed linear hull of the set \(\{a_j; j\in S\}\). This paper is very badly written. The reason is in the first place the very poor English but, also purely mathematically, it is not always clear what the author is up to. Nevertheless, the paper can be useful because of its long list of references (29 items) on the subject.