In 1935, T. Sulimirski, in a grotto near the village of Kołokolin, examined two destroyed burials, which he referred to the third period of the Neolithic period in accordance with the contemporary periodization, and proposed separating a local group of the Lublin-Volyn culture. Currently, these burials are associated with the Lublin-Volyn culture. However, the analysis of the artefacts discovered indicates that they represent two different taxonomic units. One of them, containing an amphora, should be associated with the Lublin-Volyn culture, the others with the local group (phase) of the Pleszów-Modlnica Lengyel culture. This is confirmed by analogies both from settlements and burials of the aforementioned group (phase) from the Kraków region.

In 1935, T. Sulimirski excavated two destroyed burials in a grotto near the village Kołokolin, which he referred to the third period of the Neolithic period in accordance with the periodization of that time, and proposed separating a local group of the Lublin-Volyn culture. Currently, these burials are associated with the Lublin-Volyn culture. However, the analysis of the artefacts discovered there indicates that they represent two different taxonomic units. One of them, containing an amphora, should be associated with the Lublin-Volyn culture, whereas the others are linked with the local Pleszów-Modlnica group (phase) of the Lengyel culture. This is confirmed by analogies both from settlements and burials of the aforementioned group (phase) from the Kraków region.