TY - JOUR T1 - Introduction JF - Practical Applications SP - 1 LP - 1 DO - 10.3905/pa.6.1.intro VL - 6 IS - 1 AU - Mark Adelson Y1 - 2018/07/31 UR - https://pm-research.com/content/6/1/1.15.abstract N2 - ER -