TY - JOUR T1 - Introduction JF - Practical Applications SP - 1 LP - 1 DO - 10.3905/pa.5.4.intro VL - 5 IS - 4 AU - Mark Adelson Y1 - 2018/04/30 UR - https://pm-research.com/content/5/4/1.13.abstract N2 - ER -