TY - GENERIC DO - 10.20944/preprints202103.0348.v1 UR - http://dx.doi.org/10.20944/preprints202103.0348.v1 TI - Passaggio Peak Coefficient as an Indicator of Singer Advancement T2 - Preprints AU - Gawlik, Mateusz AU - Wszołek, Wiesław PY - 2021 DA - 2021/03/12 PB - Preprints